The Pentagon's December decision to kill an Army-led program to develop a next-generation anti-armor missile was triggered by concerns about growing costs and likely schedule delays, according to a senior defense official. The Joint Common Missile, an air-to-surface round under development to replace Army, Navy and Marine Corps and possibly British military anti-armor munitions, was terminated before Christmas to find $2.3 billion as part of a larger package of weapon systems cuts. "We did an independent cost estimate for the...