9/25/2012 - Airman 1st Class Mitchell Chandler, an aircrew flight equipment technician assigned to the Air Force Reserve 931st Operations Support Squadron, McConnell Air Force Base, Kan., uses a Scott tester to check the functionality of an aviation headset, Sept. 25, 2012. Aircrew flight equipment technicians conduct tests on the earphones and communication microphones on the headsets to ensure they are in proper working order for aircrews. (U.S. Air Force photo by 1st Lt. Zach Anderson)