Members of the Air Force Band's Singing Sergeants perform the National Anthem at the Nationals' "Air Force Salute" at Nationals Park, Washington, D.C., Sept. 25, 2014. The Nationals celebrated the Air Force birthday with Secretary of the Air Force Deborah Lee James throwing the first pitch and Air Force Chief of Staff Gen. Mark A. Welsh III delivering the first ball, and approximately 50 Airmen lined the field to open the game with the New York Mets. (U.S. Air Force photo/Scott M. Ash)