1st Lt. Jeff Morrow, 457th Airlift Squadron pilot, inspects landing gear during a pre-flight check of a C-21 on Joint Base Andrews, Md., Jan. 9, 2015. The inspector looks for: loose fittings, tires with tread separation, low inflation pressure, and other defects that could deem the aircraft unsafe. (U.S. Air Force photo/Airman 1st Class Ryan J. Sonnier)