Airman 1st Class James Balcom, 37th Aircraft Maintenance Unit crew chief, fills the auxiliary power unit of a B1-B Lancer as part of his final inspections to ready the aircraft before an aircrew boards for a mission September 22, 2015 at Al Udeid Air Base, Qatar. Balcom is deployed from Ellsworth Air Force Base, S.D. (U.S. Air Force photo/Staff Sgt. Alexandre Montes)