Marine Col. Leigh Irwin officially assumes command of the Multi-Mission Tactical Unmanned Aerial Systems (UAS) program office (PMA-266), relieving Navy Capt. Dennis Monagle Sept. 18 during change of command ceremony. The event was held at NAS Patuxent River inside Air Test and Evaluation Squadron (UX) 24's hangar, with an MQ-9 Reaper as the backdrop. (U.S. Navy photo)