Master Sgt. Christopher Boots, 22nd Airlift Squadron C-5M Super Galaxy flight engineer, completes pre-flight procedures on a C-5M prior to departing for Scott Air Force Base, Ill., to participate in an aeromedical evacuation proof of concept mission, Dec. 2, 2018, at Travis Air Force Base, Calif. Active-duty, Reserve and Delaware Air National Guard Airmen worked together during the mission to test the cargo compartment of the C-5M with the goal of establishing the aircraft as part of the universal qualification training program for all aeromedical evacuation crews. (U.S. Air Force photo by Joey Swafford)