A British Royal Air Force Typhoon FGR4 taxies down the flight line at Langley Air Force Base, Va., March 3, 2015. The Typhoons will participate in Exercise Western Zephyr alongside the F-22 Raptors to test the capabilities and tactics of both aircraft when working in unison. (U.S. Air Force photo by Senior Airman Brittany E. N. Murphy/Released)