The U.S. Army last week claimed a significant accomplishment for Nike Zeus, its 48-ft. nuclear-tipped anti-missile missile. Fired from New Mexico's White Sands missile range, a Nike Zeus locked on a ranging Nike Hercules; in the first real test of its interceptor capacity, the Zeus homed in and detonated close enough to be within "lethal radius" if it had carried a nuclear warhead.
But Nike Zeus still has a long way to go, and the Defense Department is withholding $125 million appropriated for Nike Zeus production until the Army solves some major problems. For one, its radar so far cannot distinguish between...