Airman 1st Class Philip Popovich, 94th Maintenance Squadron crew chief, checks the tire pressure of an F-22 Raptor during an Operational Readiness Inspection at Langley Air Force Base, Va., April 9, 2011. The inspection evaluates an installation's ability to efficiently deploy military members and rapidly adjust to changing security conditions. (U.S. Air Force Photo/Airman 1st Class Teresa Zimmerman/Released)