A Charleston AFB C-17 is parked on the flightline while Airmen from the 437th Aircraft Maintenance Squadron perform a maintenance engine run here Nov. 19. The 437 AMXS is responsible for the maintenance of the 59 C-17s assigned to Charleston AFB with a combined value of more than $10 billion. (U.S. Air Force photo/James Bowman)

Airman 1st Class Vincent Ozzi, left, and Tech. Sgt. Kenneth Ervin stand by awaiting a maintenance engine run on the flightline here Nov. 19. The run up of the engine allows technicians to ensure all systems are fully functional before putting the aircraft into operational use. Both Airman Ozzi and Sergeant Ervin are electricians with the 437th Aircraft Maintenance Squadron. (U.S. Air Force photo/James Bowman)