Army Maj. Christopher Dempsey, left, son of Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, throws the first pitch of the baseball game between the Washington Nationals and San Francisco Giants on behalf of his father at Nationals Park in Washington, D.C., July 4, 2015. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff,, right, looks on as his son pitches Army Maj. Christopher Dempsey, left, son of Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, throws the first pitch of the baseball game between the Washington Nationals and San Francisco Giants on behalf of his father at Nationals Park in Washington, D.C., July 4, 2015. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff,, right, looks on as his son pitches SHARE: Download: Full Size (1.780313 MB) Tags: Photo Essays Credit: VIRIN: 836403-L-XTJ14-386.jpg Photo Gallery