A U.S. Air Force F-22 Raptor, British Royal Air Force Typhoon, and French air force Rafale fly in formation as part of a Trilateral Exercise held at Langley Air Force Base, Va., Dec. 7, 2015. The exercise simulates a highly-contested, degraded and operationally-limited environment where U.S. and partner pilots and ground crews can test their readiness. (U.S. Air Force photo by Senior Airman Kayla Newman)