Members of the 3rd U.S. Infantry Regiment were at Arlington National Cemetery on Thursday, placing flags at the headstones of U.S. military personnel buried at the cemetery. "Flags-In" has become an annual ceremony since the 3rd U.S. Infantry Regiment (The Old Guard) was designated to be an official ceremonial unit of the Army in 1948. (Photo by Win McNamee/Getty Images)
Old Guard soldiers place an American flag at all 400,000 gravesites inside Arlington National Cemetery. News4's Kristin Wright reports.