The Air Force plans to release a draft request for proposals for the Mark 21A nuclear reentry vehicle in late fiscal year 2018, according to a new acquisition report published this week. "The program successfully completed the materiel development decision briefing in September 2017 and expects to release a draft request for proposals in the fourth quarter of fiscal year 2018," the service's FY-17 acquisition report , released March 13, states. Inside the Air Force previously reported the Mk21A would...