The Air Force is in the early stages of an acquisition program to add the Mark 21A re-entry vehicle to the Ground-Based Strategic Deterrent, according to a recently released request for information. "This program will enter the acquisition life cycle at milestone A and conduct [the technology-maturation and risk-reduction] phase beginning in fiscal year 2019," the Oct. 25 RFI states . "The TMRR objectives are to reduce technical risk by maturing a preliminary design and demonstrating the technologies in a...