Heads of state and foreign ministers from 50-plus countries will gather next week in Seoul, South Korea, to discuss the threat of nuclear terrorism, a follow-up to the first “nuclear-security summit” convened two years ago in Washington by President Obama.

It’s folly to expect Beijing to seriously help in curbing Pyongyang.

Bad as Obama's policies are for America, they are equally dangerous for friends who have relied for decades on the U.S. nuclear umbrella as a foundation of their own national security strategies.

Chinese strategists are thinking how to win a nuclear war. What is the U.S. doing?

Speaking in 2009 about America’s approach to North Korea, then-Secretary of Defense Robert Gates famously remarked, “I’m tired of buying the same horse twice.” President Obama just repurchased that horse — and it’s a scrub.

As China grows less predictable and the United States less willing to shoulder its responsibilities, familiar patterns of bilateral relations must change.

With the signing of a Strategic Arms Reduction Treaty with Russian president Dmitri Medvedev on April 8 and the convening of the Nuclear Security Summit on April 12-13 2010, President Barack Obama pressed ahead to fulfill his vision of nuclear disarmament. Yet the administration's bilateral approach has put the arms-control...

India's big, new foreign policy idea is even worse that its last one. And that's saying something.