Systems Check
EIELSON AIR FORCE BASE, Alaska -- Staff Sgt. Chad Perkins, 31st Aircraft Maintenance Squadron, and John Coullier, Air Force Engineering Technician Services, both from Aviano Air Base, Italy, adjust the heads up display June 5 here. A HUD is a transparent display that displays data without obstructing the pilots view, Sergeant Perkins and Mr. Coullier help maintain and assure HUDs work correctly before aircraft take off for a training exercises. (U.S. Air Force photo by Airman 1st Class Christopher Griffin)