SAFETY LIGHTS U.S. Air Force Senior Airman George Carameta, lowers an aircraft obstruction light down to Staff Sgt. Ray Stetler. Carameta and Stetler are assigned to the 407th Expeditionary Communications Squadron, Ali Air Base, Iraq, Aug. 2, 2008. The lighting keeps aircraft from colliding into towers when visibility is low. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 859210-W-YCA91-829.jpg Photo Gallery