The U.S. military's nuclear strategic deterrence fleet suffered an operational flight test failure yesterday when an unarmed Minuteman III intercontinental ballistic missile reported an anomaly in flight over the Pacific Ocean, prompting the Air Force to destroy the rocket, according to a senior Defense Department official. Gen. John Hyten, chief of U.S Strategic Command, called the mishap a "rare" event and underscored the importance of such failures in the broader goal of helping ensure the nation's fleet of nuclear-armed ICBMs...