Air Force Chief of Staff Gen. Mark A. Welsh III applauds with Airmen during 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, Welsh 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)