Brenden Osborn, Lockheed Martin structure mechanic, inspects Cockpit Altitude Reduction Effort modifications to a U-2 airframe on June 25, 2013 at Beale Air Force Base, Calif. Twenty-two U-2 aircraft received the modifications from September 2012 to June 2013. The upgrades virtually eliminate the risk of decompression sickness and hypoxia. (U.S. Air Force photo by Airman 1st Class Bobby Cummings/Released)