F-22A Raptors Taxi down the runway to base X during an Operational Readiness Exercise at Langley Air Force Base, Va., Feb. 27, 2011. The exercise is a two-day long evaluation of Langley Airmen from the 633d Air Base Wing, 1st Fighter Wing and 192nd Fighter Wing worked together to practice deploying people, equipment and aircraft for contingency operations on a moment's notice.(U.S. Air Force photo by Airman 1st Class Camilla Elizeu/Released)