Pre-flight inspections
Staff Sgt. Dominique West, 20th Aircraft Maintenance Unit crew chief, reads a technical order inside a B-52H Stratofortress on Barksdale Air Force Base, La., Jan. 11. Inside the aircraft, crew chiefs inspect the light bulbs, and replace them if needed, the circuit breakers for some of the systems, fire extinguishers and the aircrew's onboard equipment. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)