Engine technician Armando Trejo writes down T-38C Talon engine run test results in the "Hush House" control room at Sheppard Air Force Base, Texas, July 19, 2018. The "Hush House" is a test facility that lets aircraft maintenance contractors strap down a T-38C and perform engine runs to preliminarily determine the success of engine maintenance on the ground before taking it to the air. (U.S. Air Force photo by John Ingle)