"D-Day's Sunken Secrets": New documentary goes underwater with WWII veterans

      |More than 5,000 ships stormed France's Normandy beaches on June 6, 1944, to free Europe from the Nazis. Hundreds of those ships sank and created one of the largest underwater archeological sites, and now WWII veterans who fought at Normandy are returning to the site. Doug Hamilton, producer, director and writer behind the NOVA/PBS special talks to the "CBS This Morning" co-hosts about what he found.