A C-37B Gulfstream 550 aircraft, tail #1942, is marshalled through the flightline at Joint Base Andrews, Maryland Dec. 20, 2019. Tail #1942 is the newest aircraft to added to the 99th Airlift Squadron inventory, which flies approximately 400 missions each year transporting senior civilians and military leaders around the world. (U.S. Air Force photo by Tech. Sgt. Kentavist P. Brackin)