HONORING THE FALLEN Arlington National Cemetery in Arlington, Va., provides a focal point for Memorial Day observances. Before the holiday, members of the 3rd U.S. Infantry Regiment, known as “The Old Guard,” place American flags in front of more than 228,000 headstones during “Flags In,” an annual tradition at the cemetery. Here's a look at Flags In, and other interesting facts you probably didn’t know about Arlington National Cemetery. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 625880-T-FLZ63-053.jpg Photo Gallery