President Obama pledged to rid the world of nuclear weapons, and he's starting with the United States. The new U.S. nuclear posture puts the country flat on its back.... Under Mr. Obama's initiative, America will forfeit its historical advantage as a technological innovator and cede future advances in nuclear weapons to other countries. This is bassackwards, since modernization efforts could lead to the development of smaller, more effective nuclear warheads that would enable further reductions in U.S. arsenals while maintaining or augmenting deterrence capabilities. Instead, America is taking a pledge to pursue nuclear obsolescence. This fits neatly in Mr. Obama's...