U.S. Air Force Master Sgt. Robbie Roberts, 125th Fighter Wing crew chief, performs post-flight checks on a F-15C Eagle at Mountain Home Air Force Base, Idaho, Sept. 30, 2013. The 125th FW deployed from Jacksonville Air National Guard Base, Fla., and will train with other Air Force, Navy, Marine, Army, Royal Canadian and German Air Force units during the multinational combined-joint exercise, which is scheduled to end Oct. 19, 2013. (U.S. Air Force photo by Master Sgt. Kevin Wallace/RELEASED)