May 25, 2015 10:40 am WATCH: Old Guard Posts Arlington Flags Members of the 3rd U.S. Infantry, known as the Old Guard, describe placing hundreds of thousands of flags on graves in Arlington National Cemetery ahead of Memorial Day. US & World Videos 2:08 Travis Kelce lands acting role with Niecy Nash in Ryan Murphy film 3:09 Daughters celebrate Kelly Clarkson superfan mom for Mother's Day 1:24 NASA releases black hole visualization 2:40 ‘The Kardashians' trailer: Kris Jenner cries revealing tumor 0:49 US pauses arms shipment to Israel over Rafah assault