Remember D-Day on its 71st anniversary with these galleries

On the 71st anniversary of D-Day, remember the Allied forces who landed on the beaches of Normandy and helped defeat the Nazis in World War II with these evocative images.

This gallery shows composite images of Omaha Beach at Colleville sur Mer, France, during D-Day on June 6, 1944, and Omaha Beach on May 7, 2014 -- then and now.

Take a similar look of composites from an aerial view:

WWII veterans from around the U.S. remember their D-Day experiences. See photos of them then and now:

Presidents, from Franklin D. Roosevelt who was in office during D-Day, to George W. Bush, address the American public and honor the day: