FLAP CONTROL U.S. Air Force Capt. Chris Lehto checks the responsiveness of the flap controls on an F-16 Aggressor aircraft while Airman 1st Class Clint Gessler looks for anything unusual, Eielson Air Force Base, Alaska, April 11, 2008. Gessler is a crew chief assigned to the 354th Aircraft Maintenance Squadron. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 725913-R-UMB14-007.jpg Photo Gallery