Tiny Nukes America's first-strike nuclear weapons: How they work. Who's in the crosshairs. As a horrified nation watched the twin towers and Pentagon dissolve in flames, a realization more chilling than the audacity of the attack gripped the nation's defense planners. The Saudi and Egyptian terrorists who turned hijacked airliners into human-guided missiles had attacked far more than the edifices of the nation's financial and military power. Although not obvious to most watching the unfolding drama, the assault also pulverized the keystone of America's strategic defense policy--the concept of nuclear deterrence. "Deterrence, the promise of massive retaliation against nations, means...