The Pentagon spent at least $58 billion over the last two decades on big-ticket weapons programs that were canceled after top officials committed to long-term development and procurement plans, according to updated figures in a new Defense Department report, with more than half of the ignominious total owning to failed Army plans. The Pentagon's acquisition executive, in a new report, identified 22 major defense acquisition programs that were canceled after being approved to begin engineering and manufacturing development -- post-milestone...