Eyes, ears of America’s Airfield
Airman 1st Class Isaiah Davis, 89th Operations Support Squadron airfield manager, checks the functionality of a runway signal at Joint Base Andrews, Md., June 7, 2017. The sign communicates to the arriving aircrew that a part of the flightline is closed due to construction and helps prevent accidents. (U.S. Air Force photo by Airman 1st Class Valentina Lopez)