Check and double check
Airman 1st Class Keith Jackson, 707th Maintenance Squadron crew chief, and Senior Airman Jacob Cartwright, 2nd Aircraft Maintenance Squadron crew chief, conduct pre-flight checks on a B-52H Stratofortress shortly before take-off on Barksdale Air Force Base, La., Feb. 5. Airmen use pre-flight inspections to search for abnormalities or issues requiring emergency maintenance. (U.S. Air Force photo/Airman 1st Class Andrew Moua)