The six-party agreement reached last week in Beijing to cap North Korea's nuclear program was a triumph for diplomacy. But contrary to much of the conventional wisdom in recent days, the fruits of the victory fall mostly to the North Koreans.

In the short term, the deal will halt the country's production of nuclear materials, limiting its ability to expand a nuclear arsenal tested in October. But for this concession, the North Koreans get to keep that arsenal intact, at least for now, and stand to make significant economic and political gains in relations with the United States, China and South Korea.

Some critics say the Beijing agreement is a lesser version of "the Agreed Framework" reached in 1994 by the Clinton administration, later cast aside by President Bush. Former Clinton-era Defense Secretary William Perry, speaking Tuesday at the Asia Society, characterized the new agreement as "thin gruel," while backing it as "a small but a very important step forward."

The ultimate judgment will await the uncertain implementation of numerous crucial, but still vaguely defined, steps down the road. The North Koreans are certain to exploit every ambiguity in the text and to drag out the phase that calls for actual dismantlement of their nuclear program and weapons.

Unfortunately, the process that led to this moment suggests that this will not go well. Contrary to the administration's version of events, Pyongyang was not dragged to this deal by pressure -- not from Washington and not from North Korea's angry patrons in Beijing.

"We don't have the North Koreans on the ropes," a former senior U.S. intelligence analyst who has watched that closeted country for decades said. "We don't have them on the run."

On the contrary, there is ample evidence that this agreement is yet another demonstration of North Korea's uniquely successful brand of negotiation via escalation: a use of brinkmanship and willingness to go up to and over the line that converts weakness into leverage.

Against that approach, the Bush administration's preference for using tools of coercion and threat, even of pre-emptive war, failed. If anything, it brought about the very opposite outcome than the United States envisioned: it encouraged North Korea to move even more rapidly to develop and test a nuclear weapon.

The pattern of brinkmanship was already clear during the Clinton years -- what Korea expert Scott Snyder famously termed "negotiating on the edge." When confronted, Snyder noted, the North Koreans typically responded by accelerating the crisis, unworried by the consequences. The fear of appearing weak has underlined all North Korean behavior.

The Bush administration came into office almost seeking a confrontation, as the president and many of his advisers were convinced the 1994 deal was fatally flawed. Ironically, the North Koreans thought they were on the verge of strategic breakthrough, after a deal to halt missile tests and preparations for President Clinton to visit Pyongyang in the final weeks of his administration. An improved relationship with the United States would balance the power of its Chinese patron, whom North Korea deeply distrusts, and give it legitimacy in an ongoing struggle with South Korea for leadership on the Korean peninsula.

Instead Bush froze the Clinton framework and sought a new, tougher approach. In January 2002, Bush delivered his famous State of the Union depiction of North Korea as a member of the "axis of evil," along with Iran and Iraq. That October, U.S. negotiators confronted Pyongyang with accusations of cheating by pursuing a clandestine uranium-enrichment program.

The 1994 agreement collapsed amid a tit-for-tat series of escalatory moves -- beginning with a U.S. cutoff of heavy fuel oil and leading to North Korea ousting international inspectors, withdrawing from the Nuclear Non-proliferation Treaty and restarting its reactor and recycling facility to produce plutonium. Bush vowed that the United States would not "be blackmailed."

Meanwhile, preparations for war in Iraq were mounting. The Bush administration was convinced the awesome display of U.S. power would successfully intimidate the other two points on the axis of evil, North Korea and Iran.

"We are hopeful," then senior State Department official John Bolton dryly said as the invasion came to a close, "that a number of regimes will draw the appropriate lesson from Iraq -- that the pursuit of weapons of mass destruction is not in their interest."

American threat

The North Korean officials drew an entirely different conclusion: they could not afford to seem weak in the face of what they perceived as an American threat to terminate their regime.

"Only tremendous military deterrent force powerful enough to decisively beat back an attack supported by ultra-modern weapons can avert a war and protect the security of the country," said an official statement issued April 6. "This is the lesson drawn from the Iraqi war."

A drawn-out process of negotiations began later that month, beginning with a three-way meeting in China and moving that summer to six-party talks that also included South Korea, Japan and Russia. The U.S. position was to deny Pyongyang what it wanted most -- direct talks with Washington -- and to demand verified dismantlement of its nuclear program, on the model of Libya, before any rewards, economic or political, were provided.

As the war in Iraq wore on, and the threat of military force became less credible, the administration looked for other coercive tools. It forged a multinational agreement to intercept suspicious cargoes and launched a crackdown on illicit North Korea trafficking in drugs and counterfeit currency and goods, which are believed to be the main source of support for the regime's elite.

The North Koreans countered with their own demands, offering a plan to freeze their nuclear program, with compensation, followed by a coordinated series of reciprocal steps leading toward eliminating the program. Their offers were accompanied by statements that they already had the bomb and were prepared to test it.

When the Bush administration started its second term in 2005, it attempted to escalate pressure -- this time with charges that North Korea was exporting nuclear materials to the Middle East and calls for China to put pressure on its difficult clients. Pyongyang moved to unload a second set of spent fuel from its reactor and reprocess it -- American experts believe North Korea created six to eight bombs worth of plutonium after 2002.

Agreement sours

A return to the bargaining table in September 2005 yielded an agreement on the principles that would underlie a denuclearization of the Korean peninsula. But that sign of progress disappeared within hours as both sides sparred over the meaning of a pledge to build nuclear power reactors for North Korea as compensation for it dismantling its nuclear weapons.

The imposition of measures to curb the flow of North Korean "illicit" money through Chinese and other banks added to the acrimony. Administration officials described this as a legal issue driven by Treasury Department efforts to curb counterfeiting. But as Bush admitted recently, it was used as leverage in the nuclear talks.

Throughout the past year, Bush administration officials expressed confidence that these measures were causing serious pain to the North Korean leadership. Some even talked boldly of "turning out the lights" in Pyongyang through such sanctions.

But Pyongyang could read the news from Iraq as well as any American voter. Instead of having its lights turned out, North Koreans put up their own light shows. On July 4, a date chosen with apparent intent, they carried out a test of a battery of ballistic missiles, in defiance of warnings, including one from China. A U.N. resolution condemning the action -- and other steps, including a South Korean suspension of food and fertilizer aid and Chinese attempts to slow trade -- followed.

In October, again in defiance of pressure from all fronts, the North Koreans tested a nuclear device. This prompted another U.N. resolution, backed by China, to impose limited economic sanctions. But although China was clearly angered, there is little evidence it moved to cut off the lifeline of trade, particularly energy supplies.

North Korea's willingness to cross what everyone believed was a "red line" changed the equation permanently. It allowed Pyongyang to return to the six-party talks, stalled for more than a year, but now from a position of strength. At the meeting in December, the North Koreans refused to discuss any other issues unless the U.S. financial sanctions were removed. North Korean officials hinted of preparations for a second test.

The United States blinked, agreeing to hold long-sought direct talks, held in Berlin in mid-January. The talks yielded the outlines of the Beijing deal but also a separate U.S. concession to lift the financial measures within 30 days of signing a broader deal.

The Beijing agreement more closely resembles North Korea's June 2004 freeze proposal than it does the U.S. insistence that dismantling nuclear weapons precede any substantial rewards. Clearly, this is a deal the Bush administration would not have made, says Scott Snyder, "if it were not tied down with so many other problems."

North Korea made its own concessions in the Beijing agreement. But "it doesn't necessarily mean Pyongyang is backing down or preparing to abandon its nuclear weapons," argues Kim Sung Han, a senior analyst at the South Korean Foreign Ministry's research institute.

N. Korea's rewards

Administration officials point out that the initial freeze of North Korea's nuclear program, to be implemented in two months, yields only minor compensation, about 50,000 tons of heavy fuel oil. But that is not what Pyongyang sees as its real reward. The lifting of financial measures will facilitate its rapidly growing trade with China and South Korea. Even more important, the South Korean government has already signaled it will now lift the ban on large-scale fertilizer and food shipments -- which are crucial to North Korea's spring planting.

Less visible, but no less vital, the North Koreans are trying to hold off a conservative comeback to power in the South Korean presidential election in December. A North-South summit meeting may take place, which would be part of an effort by the progressive South Korean government to shore up its support.

Ultimately, the Beijing agreement may yield a trade of nuclear facilities for economic and political relations, leaving the nuclear arsenal capped but still intact. For some U.S. experts, that is sufficient.

"It will limit the size of the nuclear arsenal and the amount of bomb fuel," observes former Los Alamos nuclear laboratory director and Stanford scholar Siegfried Hecker. And that, he says, should make it less likely North Korea would sell its nuclear materials or expertise to Iran.

The bargain made in Beijing flows inexorably from North Korea's skillful playing of the escalation game. But it may be the best outcome possible, given that North Korea has already crossed the nuclear threshold and that the Bush administration has squandered U.S. power in the deserts of Iraq.

Reprinted with permission from the San Jose Mercury News.

To read the seismic signal sent from an abandoned coal mine in the mountains of North Korea's coast, you must first recognize that it represents four major failures, two grave dangers, and one big opportunity.

The apparent explosion of a nuclear device, coming after two decades of trying to stop North Korea from achieving this goal, is a manifest failure of policy on four fronts -- a failure of U.S. nuclear non-proliferation policy, a failure of international diplomacy, a failure of Chinese leadership and a failure of South Korea's strategy of engaging the North.

Having failed so completely, the world now faces two grave dangers. The first is the very real threat of war on the Korean Peninsula, triggered by a series of escalatory actions in the wake of the bomb test. The second is the danger that North Korea will proliferate its nuclear technology, materials or know-how to others -- not the least to another nuclear hopeful, Iran.

But there remains a lone and tenuous opportunity. Having removed all ambiguity about its nuclear ambitions, North Korea may finally have created a common sense of threat that will galvanize the kind of concerted international action that so far has been absent.

THE FOUR FAILURES

Non-proliferation failure

The United States has spent two decades trying to stop North Korea from going nuclear, a turbulent period of crisis and negotiation that even went to the brink of war. At least three administrations confronted this problem and none, certainly not the Bush administration, can escape blame.

North Korea agreed to sign the Nuclear Non-Proliferation Treaty (NPT) in 1985, but it stalled before signing an agreement with the International Atomic Energy Agency (IAEA) in 1992 to place its nuclear facilities under international safeguards and inspections. During that time the North Koreans reprocessed some spent fuel from their reactor into plutonium - an amount that American intelligence believes was enough for building one or two warheads.

North Korea's resistance to full inspections, while it kept pulling spent fuel rods out of its reactor, provoked a crisis in 1994 and led the Clinton administration to ready military forces to strike the North's nuclear facilities. In a last-minute deal, North Korea froze its reactor and reprocessing facilities, effectively halting plutonium production under IAEA supervision. In exchange, the United States, Japan, South Korea and others agreed to construct two light-water reactors for North Korea and to supply fuel oil until the reactors came online.

The deal was troubled from the start. Neither party was satisfied with the compromise or the way it was to be implemented. By the late 1990s, the North had begun a secret effort to acquire uranium-enrichment technology from Pakistan and, in 1998, tested a long-range ballistic missile. Despite this, the plutonium freeze remained in place. But it did not survive the Bush administration.

The Bush administration came into office challenging the value of the agreement and froze contacts with the North. After receiving intelligence showing moves to build enrichment facilities, it confronted North Korean officials at an acrimonious meeting in Pyongyang in October 2002.

The United States halted fuel shipments a month later, and, in early 2003, the North Koreans expelled IAEA inspectors and withdrew from the Non-Proliferation Treaty. They proceeded to reprocess the fuel rods they had stored for a decade, producing enough plutonium, intelligence estimates say, for four to six nuclear warheads. In February 2005, the North Koreans announced they had manufactured nuclear weapons. Last week, they apparently made good on that declaration.

Blame aside, North Korea's emergence as the world's ninth nuclear power may be the most serious failure in non-proliferation history. Unlike India and Pakistan, which remained outside the system of international treaties, North Korea acted in defiance of those controls. Who might be next?

Diplomatic failure

Unlike Iraq, the attempt to stop North Korea's nuclear program has relied on the tools of diplomacy, accompanied by economic incentives and coercive sanctions.

But serious questions have been raised from the start about the sincerity and methods of the diplomatic efforts, particularly on the part of the United States and North Korea. The Bush administration has insisted -- and the president continues to make this argument -- that direct talks with North Korea do not work. Pyongyang has tried to frame everything as an issue with Washington, undermining talks that involved others, including South Korea.

Bush's stance lends credibility to those who charge the administration seeks "regime change," not a compromise that it believes will lend legitimacy to Kim Jong Il. The North Koreans now appear to have used the talks to buy time and build bombs.

Diplomacy has, at American insistence, consisted of six-party talks, held under Chinese auspices and including both Koreas, Japan and Russia. In truth, little real negotiating went on at these gatherings, at least until the last full round of talks in September 2005. In contrast to the thousands of hours of negotiations between Americans and North Koreans that led to the 1994 deal, there have been only tens of hours of actual give and take.

It is intriguing that the September agreement on a statement of principles for denuclearization came only after the State Department's chief negotiator was finally allowed to talk to his North Korean counterpart at length. Even then, their agreement evaporated almost immediately as they dueled publicly over the deal's meaning. American financial sanctions against North Korean currency counterfeiting further clouded the atmosphere, and direct contacts ground to a halt.

China's failure

The North Korean nuclear crisis is also a failure of China's bid for regional, if not global leadership. North Korea is an ally of China, a relationship that goes back more than half a century to the Korean War, when Chinese "volunteers" poured across the border to prevent an American victory. Their relationship has become more difficult since China embarked on market reforms while North Korea clung to its peculiar brand of Stalinism.

China has been torn between its loyalty to Pyongyang, its desire to maintain a stable balance of power in the region and its fear that the North's nuclear ambitions could provoke conflict on its borders. By becoming host for the six-party talks, Beijing stepped into an unusual leadership role.

The Bush administration was eager to move the burden of the North Korean problem onto the Chinese. Some administration hard-liners argued that China had the power to trigger the collapse of Kim Jung Il's regime by cutting off energy and food supplies.

Time and again, Beijing dragged the North Koreans back to the negotiating table, while also pushing Washington to engage Pyongyang in the talks. But Chinese irritation over American inflexibility has now been trumped by North Korea's defiance. Chinese policy-makers now wonder how they can punish the North without creating chaos, or war.

Failure of engagement

The final failure lies on the doorstep of South Korea's 10-year-long policy of engagement. The "sunshine policy" asserted that the North could be induced to give up its nuclear option by opening up the isolated communist state and promoting the forces of Chinese-style reform.

After a historic summit meeting in 2000, South Korean aid and trade, even tourists, flowed into the North. South Koreans lost their fear of a former foe, seeing it more as an impoverished lost brother than a mortal threat. Tensions with their American allies rose because of a gap in the North's perceived threat. The United States wondered why its troops should continue to defend South Korea.

Now South Koreans must confront the possibility that the North may have used engagement only to buy time.

THE TWO DANGERS

Threat of war

With eyes on Iraq and the Middle East, the Korean Peninsula has been far from the center of American attention. American forces based in South Korea and Japan have been dispatched to Iraq.

Yet the demilitarized zone that separates the two Koreas remains the most militarized frontier on the planet, with hundreds of thousands of well-armed soldiers poised against each other. Clashes along that frontier used to be commonplace and there are signs of a renewal of tensions. The danger of unintended escalation cannot be dismissed.

What might happen if a U.S. naval vessel, moving to inspect a North Korean freighter - as the U.N. resolution may authorize - is fired on or even captured, as the USS Pueblo was in 1968? It is a frightening scenario already worrying some at the Pentagon and the State Department.

Risk of proliferation

More than anything else, American policy-makers fear that North Korea, emboldened by its nuclear success and perhaps desperate for funds amid economic sanctions, might sell its nuclear expertise to Iran and others, including terrorist groups.

For Pyongyang, an alliance with Iran is a logical response to American and global pressure. The North Koreans have sold ballistic missiles to Tehran since the 1980s and rumors of nuclear cooperation persist.

An American effort to interdict the movement of ships and planes to Iran -- with possible U.N. backing - is probable. But the most likely transit is across the long and loosely controlled land border with China. The amount of plutonium needed to make a warhead is the size of a grapefruit and hard to detect - creating yet another nightmare scenario.

THE OPPORTUNITY

In this otherwise bleak landscape, there is an opportunity. For the first time, there is a chance of a consensus among the key players -- China, Japan, South Korea, Russia and the United States. The passage of a U.N. resolution is a small step in that direction. But the real test will come next, as the nations must cooperate to put pressure on North Korea, while coolly navigating the perils of war and making sure to leave open a diplomatic exit.

There is a slim chance of such concerted action, and a limited window for achieving it. Not everyone sees the dangers the same way. Signs of rethinking errors of the past are no more evident in Beijing and Seoul than they are in Washington or Tokyo. Ultimately, however, if they are to seize this moment of opportunity, all parties must face up to the fact that the policies of the past have failed.

What is South Korea's strategic posture in East Asia?

After the Korean War ended in 1953, South Korea and the United States established a political and security alliance that has lasted more than half a century. "For a number of decades, South Korea primarily defined itself as a U.S. ally, with the enemy to the north," says Donald Gregg, president of the Korea Society and a former U.S. ambassador to Korea. However, South Korea is now trying to create a new role for itself in Asia. Seoul is exploring a growing economic relationship with China--which passed the United States in 2003 to become South Korea's largest trading partner--and its policy of engagement and growing cooperation with North Korea is pulling it away from the United States. "All we know for sure is that South Korea's role is no longer junior partner to the U.S.," says David Kang, a visiting professor of Asian studies at Stanford University. "The days when they would just unquestioningly follow the U.S. are over."

Kang and other experts say Seoul is beginning to shift its focus towards increasing regional ties with its Asian neighbors. The U.S.-South Korea relationship, while still strong, is not as exclusive as it has been in the past. "South Korea is still an ally of the United States ... nevertheless, it has been the most active country in promoting East Asian cooperation and integration, and will probably continue to do so," says Charles Armstrong, professor of history and director of the Center for Korean Studies at Columbia University.

What are South Korea's biggest foreign policy challenges?

Dealing with North Korea while preserving its relationship with the United States, maintaining relations with Japan, and addressing potential long-term military or economic threats from China, experts say. But "the major issue for Seoul is overwhelmingly North Korea, and everything else gets filtered through that lens," Kang says. South Korea looks to its northern neighbor with the goal of eventual reunification, and therefore seeks economic cooperation and political engagement to smooth relations and slowly move down that path. The United States, on the other hand, is primarily seeking to prevent North Korea from gaining nuclear weapons, and has refused to engage with Pyongyang until that issue is resolved.

Other experts see a disconnect between how South Korea views its role in the region and how other nations see it. South Korean officials talk of playing a "balancing" or mediating role in regional disputes, including tensions between China and Japan and the nuclear standoff between the United States and North Korea. But South Korea's "actual ability to mediate and balance is limited," says Armstrong. And while South Korean President Roh Moo-Hyun has expressed hopes of building Seoul into a logistics and business hub for the region, existing tensions on the peninsula--including international fears that North Korea is amassing a nuclear arsenal--cloud any long-term economic plans. As things stand, South Korea has the world's 11th largest economy, but not a corresponding level of political clout.

How is South Korea dealing with North Korea?

Through a policy of active engagement. In 1998, Former President Kim Dae-Jung introduced the "Sunshine Policy" aimed at improving ties with North Korea while assuring Pyongyang that Seoul is not trying to absorb it. Since then, "the degree of economic interaction between south and north has substantially increased," Armstrong says. Kim and North Korean President Kim Jung-Il met at a historic summit in 2000, and increasing progress has been made on a range of issues, from economic--increased rail links and joint projects like the Gaesung industrial complex--to social and symbolic, including cross-border family visits and Korean athletes marching together under a single flag at the Olympics. Trade between the two countries reached $697 million in 2004, and South Korea is now Pyongyang's second-largest trading partner after China.

South Korea sees engagement with North Korea as yielding far more benefits than confrontation. "South Korea is reorienting itself toward reconciliation and eventual reunification of the peninsula," Gregg says. South Korean officials say reunification would reduce the burden on each side of maintaining huge armies, help improve living standards, draw international investment, create employment, and help avert the worst possibility: open war on the Korean peninsula.

What is South Korea's relationship with China?

South Korea is developing increasingly warm relations with its giant western neighbor. "There is a real fascination with China in South Korea, and the flow of investment, exports, students, tourists, and businessmen going to China from South Korea has exploded in the last several years," Armstrong says. Bilateral trade between Seoul and Beijing reached $90 billion in 2004, a 42 percent increase from 2003. The two countries also agree politically on issues ranging from opposition to Japanese Prime Minister Junichiro Koizumi's visits to the Yasukuni war shrine, to accord on how to deal with North Korea's nuclear ambitions. China is also choosing the path of engagement with North Korea, and helping Pyongyang find a "Chinese way" to develop: that is, increasing economic openness without sacrificing political control. "On the whole, [South Korea and China] see pretty much eye to eye on the major geopolitical issues," Kang says.

Beijing, like Seoul, is investing in North Korea, which has ample natural resources--including coal, iron, and gold--and a low-cost labor force. In 2003, Chinese investment in North Korea was $1.1 million; in 2004, it ballooned to $50 million; and in 2005, it was expected to reach $85-90 million. The volume of trade between China and North Korea reached $1.5 billion in 2005, making Beijing Pyongyang's largest foreign trading partner. North Korean leader Kim Jung-Il, who rarely travels, emphasized Beijing's importance to his country by visiting China in January.

South Korea is positioning itself to be closer to an ascendant China, but trying to do it without jeopardizing existing ties with the United States. South Korea's biggest worry, experts say, is being pulled into a conflict between the United States and China over Taiwan.

What's the relationship like between South Korea and Japan?

"Very bad at the moment in terms of public diplomacy and popular opinion," Columbia University's Armstrong says. South Korean wariness of Japan dates back at least to 1910, when imperial Japan invaded Korea and ruled it as a colony for thirty-five years. During the occupation, Japanese efforts to suppress Korean language and culture earned Korean enmity. During World War II, the Japanese practice of using "comfort women"--women from occupied countries, mostly Korea, who were forced to serve as prostitutes for the Japanese army--increased the anti-Japanese feeling.

South Koreans, and others across the region, are also infuriated by Koizumi's annual visit to the Yasukuni shrine. The site honors more than two million Japanese war dead, but includes the remains of more than a dozen convicted war criminals. South Korea also has disputes with Japan over territory. Both countries claim a group of islands--and the fishing and mineral rights around them--in the Sea of Japan that the Koreans call Dokdo and the Japanese call Takeshima. And many critics in South Korea and across Asia accuse Japan of whitewashing its wartime atrocities in its grade-school textbooks.

But much of the South Korean conflict with Japan may be for domestic political consumption, some experts say. "Under the surface, I would say the degree of interaction [between Seoul and Tokyo] remains high and, in the economic realm, is rather good," Armstrong says.

How is South Korea dealing with the United States?

While experts say most South Koreans still consider the U.S.-Korean alliance the backbone of their security relationship, time has passed and attitudes are shifting. A new generation of South Koreans, assertive and nationalistic, are less mindful of the Korean War--and less grateful for American intervention in the conflict that left nearly three million Koreans dead or wounded--and more resistant to what they see as a U.S. attempt to impose its values and Washington's singular focus on terrorism. The United States has opposed South Korean engagement efforts with North Korea, and has also moved to increase its ties with Japan. The Bush administration's foreign policy, including the war on terror, its punitive stance toward North Korean nuclear weapons, and particularly the invasion of Iraq, is highly unpopular in South Korea, according to opinion surveys there.

South Koreans are also increasingly demanding more control over their country's military and political affairs. In 2004, the United States returned several military bases to Korean control, and agreed to withdraw 12,500 of the 37,500 U.S. troops currently stationed in Korea by 2008. U.S. officials, including Defense Secretary Donald Rumsfeld, had been pushing for South Korea to take more of a role in the defense of the Korean peninsula, to free up U.S. forces for deployment elsewhere. But, all differences aside, Seoul is still eager to cooperate with the United States. South Korea, with some 3,000 troops in Iraq, is the third-largest member of the U.S.-led coalition there, behind the United States and Britain.

What is the recent history of the region?

Poised between China and Japan, fought over by the United States and Russia, the Korean peninsula long has played a central role in Asia's geopolitical affairs. After World War II, Japanese colonial rule gave way to U.S. and Soviet trusteeship over the southern and northern halves of Korea, respectively. The peninsula was divided at the 38th Parallel. In 1948, the southern Republic of Korea and the northern Democratic People's Republic of Korea, under Kim Il-Sung, were established.

In 1950, North Korean forces invaded South Korea, starting a conflict that brought in China on the North Korean side and a U.S.-led UN coalition on the South Korean side. While an armistice was agreed to in 1953, a formal peace treaty was never signed. In 1954, the United States agreed to help South Korea defend itself against external aggression in a mutual defense treaty. U.S. troops have been stationed in Korea since then. In addition to this important security relationship, shared interests in the last fifty years have included fighting communism and, since the 1980s, establishing a strong democracy and fostering economic development. However, in recent years strain has emerged on a range of issues, none more important than how to handle Pyongyang.

Pre-emption used to be the watchword of Bush foreign policy. The world's sole superpower would not hesitate to wield force against an imminent threat to its security. The old doctrines of the Cold War era -- of containment and deterrence of a potential enemy -- were disdained as weakness.

Now, facing the most serious national security challenge since the end of the Cold War -- the nuclear weapons programs of Iran and North Korea -- the administration is reaching back to those oldies but goodies.

The determination of Iran and North Korea to develop nuclear weapons has so far been largely unchecked by this administration. The North Koreans, since breaking out of the freeze agreed to during the Clinton administration, have been steadily producing plutonium, and presumably warheads. The Iranians, after the election of hard-line President Mahmoud Ahmadinejad, reversed their deal to suspend uranium-enrichment activities, the crucial step toward nuclear weapons.

Diplomatic negotiations in both cases have produced little movement. But a military strike on their nuclear facilities is almost inconceivable. The danger of potentially horrendous retaliation and the sapping of American will and resources in Iraq have almost killed that option.

"As shaky as a policy of containment is, it is certainly preferable to confrontation, 'rollback,' or 'regime change' through military force,'' wrote conservative national security expert Thomas Donnelly in a recent analysis. "Containment is, in fact, regime change by tolerable means, and the solution to the problems of Iran and North Korea lie in an indirect approach.''

While we try to contain a nuclear Iran and North Korea, suggested Donnelly, we should surround Iran with movements for democratic change in Iraq and Afghanistan. North Korea, he believes, will be changed through Chinese influence.

Donnelly cautions that there may be circumstances when containment proves even more risky than intervention -- say if Iran tries to slip nuclear materials to Islamist terrorists. Iran is less stable than the Soviet Union, though it is worth remembering that the first 15 years of the Cold War brought us to the brink of nuclear war once and close to it several times.

For the administration, this is a stealth policy shift. That is no surprise. It flows directly from the mess in Iraq, a mistake the administration can never really acknowledge.

For those who once touted American global domination, it is still hard to face the reality that containment is impossible without allies and partners. By ourselves, we cannot press those regimes by cutting off their access to investment and advanced technology.

The administration is rightly moving to take Iran to the United Nations Security Council to seek a mandate to enforce the demands of the International Atomic Energy Agency. North Korea is undoubtedly watching this carefully.

China and Russia, who have veto power in the Security Council, are reluctantly going along. But they still resist any move to impose economic sanctions against Iran. Nor are the Europeans, Japanese and others who depend on oil and gas from Iran eager to halt their investment and trade.

Similarly in the case of North Korea, the Chinese and South Koreans are not prepared to cut the flow of economic aid and investment into the otherwise isolated North Korean state. This is less a case of economic interests than a fear that sanctions will escalate to greater confrontation, even war.

"The strategic challenge the Bush administration faced was to convince the rest of the world that Iran is more dangerous than the United States,'' says nuclear proliferation expert George Perkovich. "They finally did it -- and it took Ahmadinejad to do it,'' referring to the inflammatory rhetoric, including threats to "wipe Israel off the map,'' issued by the Iranian leader.

The administration made some headway down the same path with North Korea by engaging in direct talks with that regime this past fall, dispelling the image that the United States was unwilling to negotiate. But that progress has been undermined recently because hard-liners inside the Bush administration pulled the plug on such talks.

Managing an effective containment partnership will be a huge challenge. And there is still tremendous resistance inside the administration to engaging and negotiating -- and compromising -- with the enemy. But that was always a part of making containment succeed, even at the height of the Cold War.

Containment is no silver bullet. It is merely, as Donnelly puts it, "the least bad alternative, but not by a lot, and not under all circumstances.'' And right now, it is the only game in town.