Pentagon acquisition chief Ashton Carter has recertified the Army's Apache Block III program following an April "critical" Nunn-McCurdy breach, splitting the helicopter effort into two distinct major defense acquisition programs. In a letter dated June 1 -- the last day of a 60-day recertification window for the Nunn-McCurdy review process -- Carter told congressional defense committee leaders the Apache Block III program was essential to national security, and that new unit cost estimates have been determined to be reasonable. As...