Airman 1st Class Kyle Hughes inspects an F-16 Fighting Falcon May 8 at Eielson Air Force Base, Alaska. The 18th Aggressor Squadron pilots are simulating enemy aircraft during Northern Edge, a joint-training exercise held yearly. Airman Hughes is a 354th Aircraft Maintenance Squadron crew chief. The exercise gives pilots a chance to train during a realistic representation of possible threats. (U.S. Air Force photo/Airman 1st Class Jonathan Steffen)