Preparing to take-off
Maj. Chris Collins, 91st Air Refueling Squadron assistant director of operations, and Airman 1st Class Kevin Brown, 6th Aircraft Maintenance Squadron crew chief, inspects an engine safety panel of a KC-135 Stratotanker at MacDill Air Force Base, Fla., Oct. 2, 2012. The engine safety panel holds an external fire preventative unit that would release fluid in the event of a fire. (U.S. Air Force photo by Airman 1st Class Shandresha Mitchell/released)