Senior Airman Kyle Carter torques a forward compressor case during assembly of an F-16 Fighting Falcon engine Aug. 12, 2009, Eielson Air Force Base, Alaska. The F-16 has a thrust-to-weight ratio greater than one, providing power to climb and accelerate vertically. Airman Carter is an Aerospace Propulsion Journeyman assigned to the 354th Maintenance Squadron. (U.S. Air Force photo/Airman 1st Class Laura Goodgame)