Master Sgt. Jonathan S. McPherson, Max Impact pianist, performs for fans before the Washington Nationals versus Miami Marlins baseball game at Nationals Park, Washington, D.C., Sept. 19, 2013. Airmen from the National Capitol Region participated in various pre-game events and ceremonies in honor of Air Force Night. (U.S. Air Force photo/Airman 1st Class Erin O’Shea)