NATIONAL ANTHEM Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, sings the national anthem with members of the Army chorus before the game between the Washington Nationals and Milwaukee Brewers at Nationals Park in Washington, D.C., July 4, 2013. Following the game, Dempsey posted a Facebook message, including the video of his performance, in honor of Independence Day. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 529412-J-QGM19-122.jpg Photo Gallery