Eric Bollinger, 458 Airlift Squadron aircraft technician, inspects the underside of a C-21A, checking for any problems with the landing gear or tires, March 18, 2015 at Scott Air Force Base, Ill. Bollinger’s post flight inspection includes checking engines and tires, changing them if need be and cleaning the C-21As. (U.S. Air Force photo/Senior Airman Joshua Eikren)