Engines running
Senior Airman Shaan Kashyap installs the mount bolts of an engine diagnostics unit at Seymour Johnson Air Force Base, N.C., May 21. Airman Kashyap is responsible for running ground, which means to check for damage or mishaps while the engine is running. Airman Kashyap is assigned to the 4th Component Maintenance Squadron as an aerospace propulsion specialist, (U.S. Air Force photo/Airman 1st Class Salma Nebot)