Chief of Staff of the Air Force Gen. Norton A. Schwartz pins the Silver Star on Staff Sgt. Sean Harvell during a medal ceremony at Joint Base Lewis-McChord, Wash., April 29. Two Silver Stars, the nation’s third highest decoration for valor, were presented first to Sergeant Harvell for his actions during multiple firefights with enemy forces in Afghanistan during spring and summer 2007. (U.S. Air Force photo/Abner Guzman)