Rear Adm. John Lemmon, Program Executive Officer for Tactical Aircraft Programs, presents Col. Mark Amspacher with a Legion of Merit award during a retirement and transition of command event April 1. Amspacher transferred command of the AV-8B Weapons Systems Program Office (PMA-257) to Capt. Gregory Sutton. Amspacher retired after 26 years of service with the U.S. Marine Corps.