This week President Bush will seek to focus the nation's attention on border security and immigration reform. But the president's proposals won't protect Americans from our gravest cross-border threat: the possibility that a ship, truck or train will one day import a 40-foot cargo container in which terrorists have hidden a dirty bomb or nuclear weapon.

The Bush administration maintains that it has a smart strategy to reduce this risk. A new 24-Hour Rule requires that importers report the contents of their containers to customs inspectors one day before the boxes are loaded on ships bound for the United States. The Department of Homeland Security's National Targeting Center then reviews the data, checking against other intelligence to determine which boxes may pose a threat. Although the containers deemed high risk are inspected at cooperating foreign ports or when they enter the United States, the rest--more than 90 percent--land here without any perusal.

We have two concerns about this strategy. First, it presumes that the United States government has good enough intelligence about Al Qaeda to reliably discern which containers are suspicious and which are not. But our inability to thwart the attacks in Iraq demonstrates that we lack such specific tactical intelligence. And supporting customs inspectors, who must make the first assessment of risk, is not a priority for the intelligence agencies. Inspectors must rely on their experience in spotting anomalies--a company that claims to be exporting pineapples from Iceland, for example.

Second, determined terrorists can easily take advantage of the knowledge that customs inspectors routinely designate certain shipments as low risk. A container frequently makes 10 or more stops between its factory of origin and the vessel carrying it to American shores. Many of the way stations are in poorly policed parts of the world. Because name-brand companies like Wal-Mart and General Motors are widely known to be considered low-risk, terrorists need only to stake out their shipment routes and exploit the weakest points to introduce a weapon of mass destruction. A terrorist cell posing as a legal shipping company for more than two years, or a terrorist truck driver hauling goods from a well-known shipper, can also be confident of being perceived as low risk.

So what needs to be done? A pilot project under way in Hong Kong, the world's largest container port along with Singapore, offers one piece of a potential solution. At an estimated cost of $7 per container, new technology can photograph the box's exterior, screen for radioactive material, and collect a gamma-ray image of a box's contents while the truck on which it is carried moves at 10 miles per hour.

Terrorists can defeat radiation sensors by shielding a dirty bomb with dense materials like lead. But by combining those sensors with gamma ray images, the Hong Kong system allows inspectors to sound the alarm on suspiciously dense objects. Inspectors would need to analyze enough of the scans--perhaps 20 percent to 30 percent--to convince terrorists that there is a good chance that an indistinct image will lead a container's contents to be sent for more reliable X-ray or manual examinations. Images of container contents would then be reviewed remotely by inspectors inside the United States who are trained to spot possible nuclear weapons.

If terrorists were to succeed in shipping a dirty bomb, for example, the database of these images could serve as a kind of black box--an invaluable forensic tool in the effort to identify how and where security was breached. That information could help prevent politicians from reacting spasmodically and freezing the entire container system after an attack.

Such a program could significantly reduce the likelihood that terrorists will smuggle plutonium or a dirty bomb through American ports. But it still would not stop a terrorist from importing highly enriched uranium, which can be used to construct a nuclear weapon. Lengthening the time that a container is screened for radiation would help, and this could be done without increasing waiting times if additional monitors were added to the Hong Kong system near the gate where the trucks must already stop for driver identification checks. Better still would be for the Department of Homeland Security to make the development of new technology that can recognize the unique signature of highly enriched uranium an urgent priority.

Finally, we must find ways to ensure that terrorists do not breach containers before shipments arrive at loading ports. Sensors should be installed inside containers in order to track their movements, detect any infiltration and discern the presence of radioactive material. Where boxes are loaded, certified independent inspectors should verify that companies have followed adequate protocols to ensure that legitimate and authorized goods are being shipped.

Taken together, these recommendations will require new investments and an extraordinary degree of international cooperation. But increased container security will not only help the United States prevent terrorism, it will also help all countries reduce theft, stop the smuggling of drugs and humans, crack down on tariff evasion and improve export controls. What's more, such a program would require an investment of just one one-hundredth of the capital that could be lost if we shut down the global container shipping system after an attack.

Container security is a complex problem with enormous stakes. American officials insist that existing programs have matters well in hand. But we cannot afford to take these perky reassurances at face value while the same officials fail to embrace promising initiatives like the Hong Kong pilot project.

We hardly needed the 30th anniversary of the Vietnam War's end to remind us of that war. Iraq provides daily reminders, prompting frequent comparisons to Vietnam. While many of the analogies are misplaced, looking back at America's intervention in Vietnam can be valuable.

The major challenge now facing the United States in Iraq is to establish a stable and powerful indigenous military to provide a secure environment for nation-building.

The U.S. Army's initial unwillingness to integrate South Vietnamese soldiers into its military plans--and its later inability to motivate the indigenous troops to take over the fighting--tells us what to avoid in Iraq.

The old Iraqi army fell apart in April 2003 as American soldiers marched on Baghdad. As the insurgency grew and American casualties mounted, the coalition forces started putting Iraq's army together again. Many of the same soldiers came back to sign up--it was only at the higher levels that Baathist officers were purged. Both Iraq and the United States have an interest in strengthening a purely Iraqi force.

Still some lessons

President Bush calls the comparison of Iraq with Vietnam a "false analogy" and accuses those who use it of sending the wrong message to the enemy and to the troops. Likewise, Rep. Richard Baker, R-La., calls the analogy "wrong, disturbing and dangerous."

In fact, Vietnam does not make for a good comparison with Iraq--but the differences are informative. The most striking difference between the two situations is in the sequence of war and nation-building. In Vietnam, the United States attempted nation-building under South Vietnamese President Ngo Dinh Diem's administration for nearly a decade before intervening directly with ground troops; in Iraq, a short and overwhelming display of force preceded nation-building. Moreover, the Americans were facing a much stronger adversary--including an organized army--in Vietnam.

Beginning in 1969, the Nixon administration implemented its policy of "Vietnamization," withdrawing U.S. troops while simultaneously turning over to the Army of the Republic of Vietnam the fighting and the pacification efforts. By 1973, the South Vietnamese army was the strongest in Southeast Asia, boasting more than 1 million soldiers and toting the most advanced weaponry, thanks to U.S. Army programs such as Enhance and Enhance Plus. However, unimpressive performances during a joint incursion into Cambodia and the 1972 spring offensive testified otherwise. Finally, on April 30, 1975, Saigon fell to the communists. Where did Vietnamization go wrong?

From the entry of American ground forces in 1965, South Vietnamese forces were made to feel marginalized in defending South Vietnam. This was mainly due to the U.S. Army's belief in 1965-69 that the South Vietnamese troops were essentially irrelevant to victory or defeat. Not only were the soldiers equipped with inferior weapons, underpaid and given poor housing compared to their American counterparts, but they also were relegated to so-called pacification missions.

U.S. soldiers had more respect for their enemies from the North than for their allies in the South. Training and communication were beset with linguistic, social and cultural barriers. By the time South Vietnamese soldiers started replacing U.S. soldiers in 1969, it was too late to induce them to adopt what had come to be regarded as U.S. strategic goals, rather than South Vietnamese ones.

It's not too late

Now, in Iraq, a window of opportunity is still open for Americans. According to Anthony Cordesman of the Center for Strategic and International Studies, the United States wasted the whole first year after the invasion in halfhearted attempts to create effective Iraqi military and police forces. The bulk of the army is made up of soldiers who were fighting Americans a few months ago. Ethnic and religious divisions among the men, and their legacy of service under an autocrat, make it difficult for them to attain modern professional military standards. However, the Iraqi people are much less distrustful of the Iraqi army than they are of occupying U.S. forces.

The Multinational Security Transition Command, set up late last year, must focus on the Iraqi army's esprit de corps. It is not too late to incorporate and integrate Iraqi forces in strategic planning and operations so that they have a stake in securing a stable Iraq. Otherwise, the Iraqi army will soon be overwhelmed by the size and hostility of a growing insurgency.

The Vietnam analogy has too often been deployed in times of political conflict in the United States. But the comparison can be useful. If we learn the right lessons from the mistakes in Vietnam, we need not be condemned to repeat them in Iraq.

The United Nations High-Level Panel on Threats, Challenges and Change completed its comprehensive review of collective security, recommending historic changes to the U.N. in its report, "A more secure world: Our shared responsibility." Among the panel's 101 recommendations for the U.N. and member states are expansion of the U.N. Security Council and creation of a Peacebuilding Commission to advance proactive, preventive global security measures.

The report culminates a year-long project for which SIIS Senior Fellow Stephen J. Stedman served as research director. The 16-member panel, commissioned by U.N. Secretary-General Kofi Annan and chaired by former Thailand Prime Minister Anand Panyarachun, represents the U.N.'s most comprehensive effort to analyze collective security, since the founding of the international body in 1947. The select panel sought international input in an effort to honor the perspectives of all member states, as it analyzed current threats and identified specific security measures.

Nations are the "front line in today's combat," Annan said, introducing the report. He added, "The task of helping states improve their own capacities to deal with contemporary threats is vital and urgent. The United Nations must be able to do this better. The panel tells us how."

The report identifies six major threats to global security: war between states; violence within states, including civil wars, large-scale human rights abuses and genocide; poverty, infectious disease and environmental degradation; nuclear, chemical, biological and radiological weapons; terrorism; and transnational organized crime.

The panel proposed expanding the U.N. Security Council--for which it put forth two options--as well as creating a Peacebuilding Commission to help the Security Council pursue the recommended preventive security strategies. One proposal for Security Council expansion would appoint new permanent members, and the other would establish new long-term, renewable seats. Neither option creates any new vetoes.

In a cover letter to the secretary-general, Panyarachun thanked CISAC and Stedman for supporting the panel's work. CISAC Co-Director Christopher F. Chyba served on the panel's 30-member resource group, providing expertise on nuclear nonproliferation and bioterrorism. CISAC hosted a nuclear nonproliferation workshop at Stanford for the panel last March, and Panyarachun discussed security issues with representatives from China, India, Pakistan, Russia and the United States at CISAC's Five-Nation Project meeting in Bangkok last summer. Stedman's research staff included Bruce Jones, a former CISAC Hamburg Fellow, and Tarun Chhabra, a graduate of CISAC's undergraduate honors program.

Annan has asked Stedman to stay at the United Nations another year to help gain worldwide support in implementing the panel's recommendations.

The panel's report received prominent news coverage, including a front-page New York Times article ("Report urges big changes for the U.N.," by Warren Hoge, Dec. 4), and in the Economist an invited article by Annan ("Courage to fulfill our responsibilities," Dec. 4) as well as several other pieces in the Nov. 24 and Dec. 4 issues.