"The United States is the most powerful since the Roman Empire," stated Stephen Walt, the Belfer Professor of International Affairs and academic dean of the John F. Kennedy School, Harvard University, delivering the 2005 Robert G. Wesson Lecture in International Relations Theory and Practice, at the Freeman Spogli Institute on November 16, 2005. America's unmatched power is therefore of great interest and concern to leaders in most other parts of the world, from President Putin in Russia, to President Chirac in France, and President Musharraf in Pakistan. For Americans, however, the key issue is how others are now responding to U.S. power.

Speaking before an audience of Stanford faculty, students, and the broader community, Professor Walt examined three interwoven themes: why other states do not welcome U.S. power; what are the main strategies available to them for dealing with American power? and what should the United States do in response?

As an integral part of his analysis, Walt showed opinion polls demonstrating a striking gap between American views of U.S. primacy and other countries' perceptions of the current U.S. role. For example, although the 2002 Pew Global Attitudes Project found that 79 percent of U.S. citizens believe it is good that "American ideas and customs are spreading around the world," and 70 percent think that U.S. foreign policy takes the interests of other states into account either "a great deal" or "a fair amount," overwhelming majorities overseas say the United States considers the interest of others "not much" or "not at all." Similarly, a 2005 BBC survey of 21 countries found only five, India, the Philippines, Poland, South Africa, and South Korea, where a majority of people had "positive" attitudes toward the United States.

There are three major sources of anti-Americanism, Walt explained. First, our sheer power makes other nations nervous. Second, there is a perceived sense of hypocrisy between our words and our actions. The case of nuclear weapons provides a vivid example. We preach nonproliferation, yet accord new respect and policy cooperation with newly nuclear states, such as India. Third, how the United States behaves in the world-what we do-invites antipathy. This latter point is abundantly clear in global opinion polls: Even in regions where anti-Americanism seems most strident, nations and individuals report that they do not object to our values or to what we stand for but rather to what we do.

Other nations, Walt pointed out, can choose a strategy of accommodation to our power or a strategy of resistance. Commonly adopted strategies of accommodation include 'bandwagoning," or realigning foreign policies with U.S. wishes, such as Libya's abandonment of nuclear weapons; "regional balancing"-using U.S. power to balance regional threats; "bonding" to curry favor with the United States; and "penetration," a strategy aimed at infiltrating the American political system to influence foreign policy outcomes.

In contrast, countries that choose to resist American power pursue five strategies:

"balancing" our power, alone or in alliance with others; "asymmetric responses," such as terrorism, which try to exploit specific areas of U.S. vulnerability; "blackmail," like North Korea's efforts to extract concessions from its nuclear weapons program; "balking," or tacit non-cooperation; and "delegitimizing," or attempts to turn others against the legitimacy of our actions or policies.

In light of the growing antipathy to U.S. primacy in so many parts of the world, Walt proposed three major courses of action to produce a more favorable response to U.S. power. First, he urged that we reduce American's military footprint abroad-and especially our ground force deployments-and return to a more traditional policy of regional balancing in cooperation with other nations. This policy would make greater use of American air and naval power and limit American intervention to cases where vital U.S. interests are threatened. Second, we should work harder to defend our international legitimacy and rebuild the U.S. image abroad, through a sustained campaign of public diplomacy and by keeping key American institutions-such as higher education-available to foreign visitors. Third, he advocated a more nuanced approach to America's traditional support for Israel, one that balances our genuine support for Israel's existence with the urgent need to bring a lasting settlement to the Israeli-Palestinian conflict.

"The more the United States uses its power in an overwhelming and capricious manner," Professor Walt warned, "the more the rest of the world will resist us." Conversely, the more the United States recognizes and respects the interests of others, while using its power to defend its own interests, the more other nations will welcome U.S. power. "The task we face," he advised, "is to rebuild the trust, admiration, and legitimacy the United States once enjoyed, so the rest of the world can focus not on taming U.S. power but on reaping the benefits it can bring."

George Habash, a militant and former secretary-general of the Popular Front for the Liberation of Palestine, once characterized terrorism as a "thinking man's game." Using mathematics, researchers at Stanford University's Center for International Security and Cooperation (CISAC) have made fighting terrorism a thinking man's game as well.

CISAC affiliate Lawrence M. Wein of the Graduate School of Business and CISAC Science Fellow Jonathan Farley are both applying mathematical models to homeland security problems, such as preventing a nuclear detonation in a major U.S. city and determining whether terrorist cells have likely been disrupted.

Wein, who teaches operations classes about different business processes used to deliver goods and services, has focused his research on bioterrorism and border issues. He has performed, he says, the first mathematical analyses of hypothetical botulism poisoning, anthrax outbreaks and smallpox infections.

"One overriding theme of my work is that all these homeland security problems are operations problems," said Wein, the Paul E. Holden Professor of Management Science. "Just as McDonald's needs to get hamburgers out in a rapid and defect-free manner, so too does the government have to get vaccines and antibiotics out and test the borders for nuclear weapons or terrorists in a rapid and defect-free manner."

In collaboration with Stephen Flynn of the Council on Foreign Relations, a nonpartisan research center, Wein recently has conducted research to improve security at U.S. borders and ports. Port security has received significant attention recently owing to the furor over Dubai Ports World's bid to manage six terminals at major U.S. harbors. The aim of Wein and Flynn's work is to prevent terrorists from bringing into the country a nuclear weaponbe it an atomic bomb or a so-called "dirty bomb," or conventional explosive packed with radioactive waste.

"Of all the problems I've studied, this is the most important because the worst-case terrorist scenario is a nuclear weapon going off in a major U.S. city and also it is the one the government has dropped the ball on the most," Wein said. "They have done a very poor job."

Instead of using the existing approach, where U.S. Customs actively inspects a minority of containers based on information from a specialized tracking system designed to identify suspicious containers, Wein and Flynn have recommended the government use a multi-layer, passive screening system for every container entering the country. Under their system, Customs would photograph a shipping container's exterior, screen for radioactive material and collect gamma-ray images of the container's contents. If terrorists shielded a bomb with a heavy metal such as lead to hide it from radiation detectors, gamma-ray imaging would allow inspectors to see the shielding and flag the container for inspection. Wein and Flynn believe this whole process would cost about $7 per container.

"Right now about maybe 6 percent of the containers are deemed suspicious and they will go through some testing and the other 94 percent of the containers just waltz right into the country without an inspector laying an eye on them," Wein said. "What we're proposing to do is 100 percent passive testing."

Wein's earlier work addressed a different threat: bioterrorism. In 2005, Wein revealed the nation's milk supply was vulnerable--a terrorist could potentially poison 100,000 gallons of milk by sneaking a few grams of botulinum into a milk tanker. Although the government and dairy industry have collaborated to intensify the heat pasteurization formula for milk, Wein is still pushing for additional botulinum testing, which he says would cost less than 1 percent of the cost of milk.

Wein also has used math to study smallpox outbreaks, the U.S. fingerprint identification system and U.S.-Mexico border security issues. Wein's congressional testimony on the fingerprint identification system in 2004 led to a switch from a two-finger system to a 10-finger system. His 2003 research on anthrax attacks resulted in a Washington, D.C., pilot program to use the U.S. Postal Service to distribute antibiotics throughout the capital after an outbreak. Seattle is now testing a similar program.

"In Washington, D.C., now, if there is a large-scale anthrax attack, postal workers will be the first to get their Cipro and, on a voluntary basis, they will go door-to-door distributing antibiotics," Wein said.

He said the common thread throughout his research is queuing theory, or the mathematical study of waiting lines, but he also draws upon mathematical epidemiology for his smallpox studies; air dispersion models for the anthrax model; supply chain management for the milk study; probability theory for the fingerprint identification system; and models for nuclear transport and detection for his work with containers.

From tainted lactose to lattice structures

While Wein is working on improving the government's counterterrorism systems, Jonathan Farley is working to figure out when terrorist organizations have been effectively disrupted. His mathematical model is designed to help law enforcement decide how to act once they have captured or killed a terrorist or a number of terrorists in a cell.

A professor at the University of the West Indies who will chair the Department of Mathematics and Computer Science there next year, Farley is on a one-year science fellowship at CISAC. In 2003, he co-founded Phoenix Mathematical Systems Modeling Inc., a company that develops mathematical solutions to homeland security problems.

He is using lattice theory--a branch of mathematics that deals with ordered sets--to determine the probability a terrorist cell has been disrupted once some of its members have been captured or killed.

"Law enforcement has to make decisions about what resources they should allocate to target different cells," Farley said. "The model should provide them with a more rational basis for allocating their scarce resources. ... It will inform you when you're making decisions about how much time and effort and how much money you're going to spend going after a particular cell."

While at Stanford, Farley hopes to unearth the perfect structure, mathematically speaking, for a terrorist cell--or in other words, a cell structure that is most resistant to the loss of members.

"If it's possible to determine the structure of an ideal terrorist cell, you can focus on a much smaller number of possibilities, because it makes more sense to assume the adversary is going to be smart rather than stupid," Farley said.

Farley has suggested it is possible Al-Qaida and other terrorist organizations already may have figured out the perfect structure for a terror cell by trial and error.

"I don't expect Osama bin Laden to be reading lattice theory in his caves in Afghanistan," said Farley. "But if it follows from the mathematics, perhaps heuristically, the terrorists will have come to the same conclusion--that this is the best way to structure a terrorist cell."

Although Farley acknowledges his model is not a panacea for terrorism, he hopes it will help reduce guesswork that might be involved in pursuing terrorists.

"It's not that I think mathematics can solve all of these problems," Farley said. "Because it can't. But it's better to use rational means to make decisions rather than guesswork."

John B. Stafford is a science-writing intern at Stanford News Service.

His Excellency Sir David Manning, British Ambassador to the United States, delivered the 2006 Frank E. and Arthur W. Payne Distinguished Lecture: "Energy: A Burning Issue for Foreign Policy," on Monday, March 13, 2006 at 4:30 p.m. in the Bechtel Conference Center at Encina Hall.

Sir David Manning has been Her Majesty's Ambassador to the United States of America since September 2, 2003.

Sir David Manning's Biography:

2003 - present: Washington, USA (Ambassador)

2001 - 2003: Foreign Policy Adviser to the Prime Minister

2001: UK Delegation NATO Brussels (Ambassador)

1998 - 2000: Foreign and Commonwealth Office (Deputy Under-Secretary)

1995 - 1998: Tel Aviv, Israel (Ambassador)

1994 - 1995: Foreign and Commonwealth Office (Head of Policy Planning Staff)

1994:UK member of Contact Group on Bosnia (International Conference on Former Yugoslavia)

1993 - 1994: Foreign and Commonwealth Office (Head of Eastern Department)

1990 - 1993: Moscow, Russia (Counselor, Head of Political Department)

1988 - 1990: Counselor on loan to Cabinet Office

1984 - 1988: Paris, France (1st Secretary)

1982 - 1984: Foreign and Commonwealth Office (Deputy Head of Policy Planning Staff)

1980 - 1982: Foreign and Commonwealth Office (Soviet Department, later Eastern Department)

1977 - 1980: New Delhi, India (2nd later 1st Secretary)

1974 - 1977: Warsaw, Poland (3rd later 2nd Secretary)

1972 - 1974: Foreign and Commonwealth Office (Mexico/Central America Department)

1972: Entered Foreign and Commonwealth Office

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.

PALO ALTO, Calif. -- The European Union is increasingly showing a new independent stance on foreign-policy issues as the logic of its industrial and economic integration plays out in the international arena.

Already the EU has taken a distinct and independent approach to both the Israel-Palestinian conflict and the nuclear crisis in Iran. Now it has broken ranks over the Korean Peninsula, fed up and concerned with the failure to resolve the ongoing crisis over North Korea's development of nuclear arms.

Reflecting this new stance, the European Parliament this week passed a comprehensive resolution on the Nonproliferation Treaty (NPT) and nuclear arms in North Korea and Iran:

• It urges the resumption of the supply of heavy fuel oil (HFO) to North Korea in exchange for a verified freeze of the Yongbyong heavy-water reactor, which is capable of producing weapons-grade plutonium, to avoid a further deterioration in the situation. At the same time it is calling for the European Council and Commission to offer to pay for these HFO supplies.
• It urges the Council of Ministers to reconsider paying 4 million Euros of the suspension costs for KEDO (the Korea Energy Development Organization) to South Korea to ensure the continued existence of an organization that could play a key role in delivering energy supplies during a settlement process.
• It demands that the Commission and Council request EU participation in future six-party talks, making it clear that the EU will in the future adopt a "no say, no pay" principle in respect to the Korean Peninsula. Having already placed more than $650 million worth of humanitarian and development aid into the North, it is no longer willing to be seen merely as a cash cow. This view was backed in the debate by the Luxembourg presidency and follows a line initially enunciated by Javier Solana's representatives last month in the Parliament's Foreign Affairs Committee.
• It urges North Korea to rejoin the NPT, return to the six-party talks and allow the resumption of negotiations.

The EP cannot substantiate U.S. allegations that North Korea has an HEU (highly enriched uranium) program or that North Korea provided HEU to Libya. It has called for its Foreign Affairs Committee to hold a public hearing to evaluate the evidence. "Once bitten, twice shy" is the consequence of U.S. claims that Iraq possessed weapons of mass destruction.

The world order is changing; the EU -- like China -- is emerging as a significant global power economically with the euro challenging the dollar as the global currency (even prior to the latest enlargement from 15 to 25 member states, the EU's economy was bigger than that of the United States). Speaking at Stanford University earlier this month, former U.S. foreign policy adviser Zbigniew Brzezinski pointed out that the EU, U.S., China, Japan and India will be the major powers in the new emerging global order. Since the new Asia will have three out of the five major players, he stressed the importance of engaging with it.

How will those already in play respond? Some may claim that statements by North Korea welcoming the EU's involvement and participation are merely polite, inoffensive small talk that cannot be taken seriously. Yet there have been a spate of pro-EU articles appearing in Rodong Sinmun, the daily newspaper of the Central Committee of the Korean Workers Party, since 2001.

Of 128 EU-related articles between 2001 and 2004, a majority praised Europe's independent counter-U.S. stance, emphasized its increasing economic power and influence, and heralded its autonomous regional integration. Rodong Sinmun portrays the EU as the only superpower that can check and balance U.S. hegemony and America's unilateral exercise of military power.

North Korea's perception of the EU is well reflected in articles such as: "EU becomes new challenge to U.S. unilateralism"; "Escalating frictions (disagreements) between Europe and U.S."; "European economy (euro) dominating that of the U.S."; "Europe strongly opposing unilateral power play of U.S.," and so forth.

Concurrently, North Korea has pursued active engagement with the EU by establishing diplomatic relations with 24 of the 25 EU member states (the exception being France). It is not necessary to read between the lines to recognize North Korea's genuine commitment to engagement with the EU based on its perception of the EU's emerging role on the world stage.

The Republic of Korea has publicly welcomed the prospect of EU involvement, while China wishes to go further and engage in bilateral discussions with the EU on its new policy toward the North. Russia will follow the majority. The problem is with Japan and the U.S.

In Japan, opinion is split by hardliners in the Liberal Democratic Party who view problems with North Korea as a convenient excuse to justify the abandonment of the Peace Constitution. They don't want a quick solution until crisis has catalyzed the transformation of Japan into what advocates call a "normal" country.

The U.S. expects an EU financial commitment, but not EU participation. The neocons believe that EU participation would change the balance of forces within the talks inexorably toward critical engagement rather than confrontation.

The question is whether the EU's offer will point the U.S. into a corner or trigger a breakthrough. Will U.S. fundamentalists outmaneuver the realists who favor a diplomatic rather than military solution? Only time will tell.

Glyn Ford, a Labour Party member of the European Parliament (representing South West England), belongs to the EP's Korean Peninsula Delegation. Soyoung Kwon is a postdoctoral fellow at Stanford University's Asia-Pacific Research Center.

Chris Farrell: Remember the dot-com boom of the 1990s? It seemed as if every entrepreneur with a good idea and a PC could challenge established companies for customers. Brick-and-mortar companies jumped on the e-commerce bandwagon. The demand for digital workers soared. Long-time computer professionals hopped from job to job, pulling down more money with every employer. Newly minted college graduates juggled multiple job offers. But when the Y2K problem emerged in the latter part of the '90s business and government quickly realized there still weren't enough IT workers on hand to find and repair the computer glitch. The quick fix? Hire computer professionals overseas. And that temporary solution permanently changed the global economy.

Paul Saffo: Y2K was huge in getting the ball rolling on offshoring.

Farrell: Paul Saffo is director of the Institute for the Future, a high-tech think tank in Silicon Valley.

Saffo: But once they went overseas, they discovered it's not just a matter of cost. These programmers overseas are often better than the best you can get in the United States.

Farrell: Ireland, the Philippines, and Israel were among the more popular destinations for offshoring Y2K programming fixes. But India became the offshore capital. It had plenty of high-tech companies staffed with well-educated English speaking digital workers. Thanks to India's steep import barriers in the 1980s, no one could afford new computer systems. So Indian tech workers were the world's leading experts in the older software languages that needed upgrading. Suhas Patil is chairman emeritus of semiconductor maker Cirrus Logic.

Suhas Patil: And they were listening to their customers and what their needs were, and as the recognition came that systems had to be upgraded to not have the problem based on the Y2K issues, that's how they got their break.

Farrell: And made the most of the opportunity. AnnaLee Saxenian is Dean of the School of Information Management and Systems at the University of California, Berkeley.

AnnaLee Saxenian: I think the importance of Y2K was overwhelmingly about establishing Indian companies' reputation among US customers and helping begin a set of customer supplier relationships that have simply taken off in the last four years.

Farrell: Of course, Y2K contracts ended in 2000. Yet many Indian companies took advantage of their now sterling programming reputations to negotiate for more sophisticated work. Research. Software development. Accounting services. Long-distance medical advice. Rafiq Dossani is a senior research scholar at Stanford University.

Rafiq Dossani: India is now growing at 70-80 per cent a year in offshored services ... services which are maintaining an accounting system, maintaining an HR system, doing claims processing, that's growing easily at 70 per cent, maybe even higher.

Farrell: Offshore also came onshore during Y2K. The town of Mountain View lies at the heart of California's Silicon Valley. Housed in one of the many nondescript low-rise office buildings that crowd the region's business avenues is the Indus Entrepreneur, or TIE. It is a networking base for the Indian high-tech Diaspora.

Shankar Muniyappa: Y2K was a big opening as early as 98.

Farrell: Shankar Muniyappa is director of information systems for TIE. He came to America for Y2K-and stayed.

Muniyappa: Myself and many of us believe still believe this is the place where you need to be if you want to be middle of innovation.

Farrell: Some 30,000 Indian IT professionals now live and work in the Valley. Rafiq Dossani of Stanford University:

Dossani: At least 25 per cent of the start ups have Indian employees at fairly senior levels working for them. And ... there's a whole infrastructure therefore being built around them because it's a substantial number now, so you see shopping malls you see business services and so on catering to this particular immigrant community.

Farrell: That community is adding vitality to the American economy. Still, many American high-tech workers are threatened by the offshoring of white collar jobs. The numbers are murky, but according to Mark Zandi of Economy.com 370,000 non-manufacturing jobs moved overseas over the past fours years-with most of the information technology jobs going to India. Salaries are down too. Still, the big factor behind the loss of 1.5 million jobs lost since Y2K is improved business efficiency or productivity - not offshoring. And Y2K also played an important role in boosting business efficiency.

Economists initially looked at Y2K as a productivity killer.

Imagine a town threatened by a rising river. Every able-bodied person in town is put to work stacking sandbags. It's necessary work to save the town - but it's unproductive work. Nothing gets built. No food gets grown.

With the Y2K bug, programmers, chief information officers, project managers, and other digital workers were getting paid to do unproductive work - stacking sandbags of silicon. No innovative investments. No new productivity enhancing software.

But economists were wrong. Y2K wasn't a flood. Instead, think of it as clearing a path choked with underbrush. Once the trail is open, it is much easier to zip from point A to point B. Y2K gave companies an excuse to clean up their software and hardware underbrush - a critical factor in today's improved business productivity. Paul Saffo:

Saffo: A lot of companies said well, gosh, if we're going to have to spend all this money to fix our software let's also see what else we can do at the same time, so it was an invitation to replace a whole bunch of stuff. ... So it forced people to ask hard questions about how they were using things and in the best instances people really did become more efficient.

Farrell: The result? Companies used the new systems they installed to cut costs and work smarter - and hire fewer workers.

[Voice of Leonard Nimoy: "Do you have hard copies of all your important documents ... such as bank statements."]

That's Leonard Nimoy, Mr. Spock from Star Trek. He's narrating the Y2K Family Survival Guide video - one of thousands of products peddled by prophets of doom. Y2K did bring home how reliant we all are on computers. Many of us still don't back up critical data at home. The same isn't true for business and government. Many learned from Y2K just how vulnerable information systems are to a malicious attack or unforeseen disaster. Case in point: Y2K actually helped some businesses survive 9/11.

[News broadcast of President George W. Bush: "I've directed the full resources of intelligence and law enforcement communities to find those responsible and bring them to justice."]

The attack on the World Trade Center stopped trading on the New York Stock Exchange. Against the odds, that citadel of capitalism opened six days later.

John Koskinen: The reason the markets, securities markets, were able to open the Monday after the Tuesday of 9-11 was they still had the test scripts that had been developed in 1998 and 99.

Farrell: John Koskinen credits preparations for Y2K. He was President Clinton's Y2K czar.

Koskinen: ... they were able to in effect take all of those Y2K scripts and make sure that all the transactions with all of the major players would close. Without that they never would have been able to do it in the time frame with the confidence they had.

Farrell: A record 2.4 billion shares traded on the New York Stock Exchange the day it reopened.

Y2K was a unique economic event. Earlier jolts to the economy, like the 1973 oil price hike and the 2001 attack of 9/11, were shocks. But the Year 2000 arrived right on schedule. The surprise was how little immediate impact the much-feared transition had on the economy. Yet we're still living and working with the economic impact of Y2K five years later.

For Marketplace and American RadioWorks, I'm Chris Farrell.