After making steady progress on nuclear weapons in the first two years of his presidency, Obama stalled after Republicans waged a fierce battle against ratifying the New START treaty. Recent speeches -- and Obama's picks for secretary of state and secretary of defense -- indicate that he is ready to resume the fight.
Shortly after taking office, Obama traveled to Prague to lay out a vision of a world "free of nuclear weapons." Now the Pentagon has prepared a top-secret memo for the White House, and the president has to decide whether to maintain or shrink the U.S. nuclear arsenal. Now he must decide whether he will uphold the principles he once preached.