The Old Guard--3rd United States Army Infanty Regiment - stock photo

Frederick, MD, USA - June 24, 2011: In Frederick's Baker Park, the United States Army's Old Guard infanty marching unit stands at attenton prior to the Twilight Tattoo celebration. The Twilight Tattoo presents the history of the Army's role in America's development, the many traditions of the United States and of the sacrifices made by members of the armed forces. The 3rd U.S. Infantry Regiment, traditionally known as The Old Guard, is the oldest active-duty infantry unit in the Army and is the U.S. Army's official ceremonial unit and escort to the President.