Staff Sgt. Trevor Helm, a crew chief for the 7th Aircraft Maintenance Unit, washes the windshield of a B-1B Lancer prior to a mission here Thursday. The windows require a special solvent to clean them due to the material used in its creation. Sergeant Helm is native to Lisbon, Maine and is deployed from Dyess Air Force Base, Texas. (U.S. Air Force Photo by Staff Sgt. Joshua Garcia/released)