11:05 AM ET, July 4, 2013
Nationals Park, Washington, D.C.
WASHINGTON, DC - JULY 04: Joint Chiefs Chairman Gen. Martin Dempsey (C) sings the national anthem with Army Chorus Quartet Staff Sgt. Ben Pattison, left, Sgt. 1st Class Alvy Powell, Sgt. 1st Class Colin Eaton and Master Sgt. Bob McDonald before a baseball game between the Washington Nationals and the Milwaukee Brewers at Nationals Park on July 4, 2013 in Washington, DC. (Photo by Patrick McDermott/Getty Images)