(Left to right) Airman 1st Class Jason Pettine, Justin Hildreth and Khayan Martinez, 28th Maintenance Squadron aerospace propulsion apprentices, remove bolts from a fan duct on a B-1B Lancer engine here, August 13. The Airmen remove the fan duct to access blades in need of repair. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)