Chairman of the Joint Chiefs of Staff Admiral Mike Mullen pays his respect to the family of US Air Force Captain David Anthony Wisniewski during his burial service at Arlington National Cemetery August 23, 2010 in Arlington, Virginia. Originally from Moville, Iowa, the Air Force captain, 31, was the pilot of a Black Hawk helicopter that was shot down during a rescue mission in Afghanistan on June 9 and died of his injuries on July 2. Wisniewski is credited with saving more than 240 soldiers in seven tours of duty in Iraq and Afghanistan, 40 of which were saved in his final rescue mission in June. He was awarded the Purple Heart on June 23.