Chief Master Sgt. (ret.) William Walter lines up a shot with his mounted Rocket Propelled Grenade launcher April 26, 2011 at a range on Eglin Air Force Base, Florida. Mr. Walter, Air Force Special Operations Command strike requirements office, helps conduct a demonstration of what damage an RPG can do to a helicopter. The helicopter is an UH1 Huey. (U.S. Air Force photo by Senior Airman David Salanitri/Released)