Exiting a Bus Air Force Senior Airman Teyler Williston exits a wrecked school bus during a heavy vehicle extrication exercise at Eastern Oklahoma County Technology Center in Choctaw, Okla., March 31, 2017. Williston is a firefighter assigned to the 507th Civil Engineer Squadron. Air Force photo by Master Sgt. Grady Epperly SHARE: Download: Full Size (1.7 MB) Tags: Air Force, training, Airmen Credit: Master Sgt. Grady Epperly VIRIN: 170331-F-YA646-148A.JPG Photo Gallery