On June 6, 1944, the Allies launched an armada to invade the Normandy beaches and liberate Europe from the Nazis. Hundreds of ships sank while running the gauntlet of mines and bunkers, creating one of the world’s largest underwater archaeological sites. Now, NOVA has exclusive access to an extensive survey of the seabed bordering the beachheads. Dive teams, submersibles and underwater robots will identify key examples of the Allied craft that fell victim to German shellfire, mines and torpedoes. Highlighting the ingenious technology that helped the Allies overcome the German defenses, and featuring first-hand accounts from Allied veterans who have returned to the site of this epic battle to share their harrowing stories, the program presents a blow-by-blow account of D-Day events and reveals how the Allies’ intricate planning and advanced technology were vital to assure the success of the most ambitious and risky military operation ever launched.