U.S. Air Force Airman 1st Class Mathew Hollenback, 55th Aircraft Maintenance Unit crew chief, inspects the bottom of a jet to make sure everything is in order and functioning properly at Shaw Air Force Base, S.C. Aug. 19, 2011. Maintainers ensure jets are in order and up to date so the pilots stay safe. (U.S. Air Force photo by Airman 1st Class Ashley Gardner/ Released)