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 0:53 Police in New Jersey wrangle runaway “ham-some” pig 1:07 Britney Spears spotted as authorities respond to alleged hotel incident 2:15 Prince William and Kate Middleton ‘going through hell,' friend claims (report) 8:01 Lady Gaga's outfit changes, Rihanna's bold looks and more iconic Met Gala moments 2:48 Taylor Swift fans react to Jake Gyllenhaal and Sabrina Carpenter's ‘SNL' appearance