An U.S. Air Force F-16C Fighting Falcon with the 18th Aggressor Squadron flies an air-to-air combat mission in support of Cope North 13 near Anderson Air Force Base, Guam, Feb. 12, 2013. The "Aggressor's" job is to know, teach and replicate the threat better than any other squadron. Cope North is an annual air combat tactics, humanitarian assistance and disaster relief exercise designed to increase the readiness and interoperability of the U.S. Air Force, Japan Air Self-Defense Force and Royal Australian Air Force. (U.S. Air Force photo by Senior Airman Matthew Bruch)