Airman 1st Class Steven Kossar, 28th Air Maintenance Squadron jet engine mechanic, uses a wrench to change the exhaust diversion nozzle of a B-1B Lancer Aug. 26, 2008. The exhaust diversion nozzle is essential to B-1B capabilities and controls the flow of thrust used to launch the jet. (U.S. Air Force photo by Airman 1st Class Adam Grant)