Staff Sgt. Andrew Green performs a preflight check April 15, 2010, during Angel Thunder 2010 at Davis-Monthan Air Force Base, Ariz. Angel Thunder, an Air Combat Command-sponsored personnel recovery and combat search and rescue exercise, and is just one of many ways that ACC officials organize, train, equip and maintain joint, combat-ready forces. (U.S. Air Force photo/Staff Sgt. Joshua L. DeMotts)