U.S. Air Force Airman 1st Class Ryan Celestino, 909th Aircraft Maintenance Unit instrument and flight control systems journeyman, turns on a TTU-205J test set to perform pitot-static tests for the KC-135R March 15, 2017, at Kadena Air Base, Japan. Pito-static tests allows maintainers to simulate diagnostic readings for jets in the air on the ground. (U.S. Air Force photo by Senior Airman Omari Bernard)