Airman 1st Class Jeremy Straub, 35th Maintenance Squadron crew chief, unscrews a bolt to remove one of the A-system hydraulic pressure lines on an F-16 Fighting Falcon, Sept. 22, 2010, at Misawa Air Base, Japan. This particular jet was in for routine maintenance. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer/Released)