The Air Force today used an unmanned aircraft and an Army missile to hit a tank target during a first-of-its-kind test, according to service sources. In the "weaponization" test, a ground-based laser marked the stationary target for the Predator, which then fired a Hellfire missile at it. Sources say the missile, which was not carrying a live warhead, struck its intended target. During the next test, scheduled for later this month, Predator will launch a live missile at a target,...