An F-22 Raptor, Royal Air Force Typhoon FGR4 and French air force Rafale fly in formation as part of a trilateral exercise held at Joint Base Langley-Eustis, 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/Senior Airman Kayla Newman)