Could The World's Next Nuclear Power Be U.S. Ally South Korea?

The United States has long sought to oppose efforts to expand the exclusive club of nuclear-armed nations, a small clique most recently joined 16 years year ago by North Korea. But as current members expand hone new capabilities and unrest plagues the international community, one or even two of Washington's own allies may seek to build a bomb of their own.For decades, South Korea and Japan have