10/26/2011 - Senior Airman Patricia Serrano, 52nd Component Maintenance Squadron aerospace propulsion mechanic, tightens a bolt on an F-16 Fighting Falcon engine while her classmates watch during Aerospace Propulsion Intermediate Maintenance training here Oct. 25. Airmen learn how to build up the core of an engine during the class, which keeps them proficient in their primary duties of maintaining engines. (U.S. Air Force photo/Airman 1st Class Brittney Frees)

10/26/2011 - Tech. Sgt. Steven Bousquet, 372nd Training Squadron propulsion instructor, shows Airmen in his class the different parts of an F-16 Fighting Falcon engine during Aerospace Propulsion Intermediate Maintenance training here Oct. 25. Airmen learn how to build up the core of an engine during the class, which keeps them proficient in their primary duties of maintaining engines. (U.S. Air Force photo/Airman 1st Class Brittney Frees)

10/26/2011 - Senior Airman Juan Serrano, 52nd Component Maintenance Squadron aerospace propulsion mechanic, assembles parts of an F-16 Fighting Falcon engine during Aerospace Propulsion Intermediate Maintenance training here Oct. 25. Airmen learn how to build up the core of an engine during the class, which keeps them proficient in their primary duties of maintaining engines. (U.S. Air Force photo/Airman 1st Class Brittney Frees)

10/26/2011 - Tech Sgt. Alvin Green, 52nd Component Maintenance Squadron aerospace propulsion mechanic, tightens a bolt on an F-16 Fighting Falcon engine during Aerospace Propulsion Intermediate Maintenance training here Oct. 25. Airmen learn how to build up the core of an engine during the class, which keeps them proficient in their primary duties of maintaining engines. (U.S. Air Force photo/Airman 1st Class Brittney Frees)