Airman 1st Class Emily Greaves, 33rd Maintenance Squadron nondestructive inspection apprentice, uses a transducer to check for cracks in the low observable paint on an F-35A Lightning II at Eglin Air Force Base Fla., May 17, 2016. The transducer picks up clear sound vibrations to identify any underlying cracks that would diminish the stealth capability of the aircraft. The transducer sends the readings to the Sonic 1200 which reveals the depth of damage inside the metal of an aircraft. (U.S. Air Force photo/Senior Airman Andrea Posey)