U.S. WWII veteran Warren Wilt, 91, from Abbyville, Kansas, left, who landed at Picauville, France, on June 6, 1944, with the 82nd Airborne Division, signs a book for Jean-Pierre Mennessier after a ceremony at the Memorial of Airborne and U.S. Air Force, in Picauville, France, Thursday.

U.S. WWII veteran 92 years old Anthony Di Bartolomeo, 92, left, from Myrtle Beach, South Carolina, who landed at Picauville, France, on June 13, 1944, with the 9th Air Force Squadron, speaks with a local after a ceremony at the Memorial of Airborne and U.S. Air Force, in Picauville, France.The Associated Press

U.S. WW II veterans Ellan Levitsky, 95, left, and her sister Dorothy Levitsky, 97, from Milford, Delaware, who landed on Picauville France on Sept. 12, 1944 , with the 164th General Hospital, sing the national anthem during a ceremony at the Memorial of Airborne and U.S. Air Force, in Picauville, France, Thursday.The Associated Press

In this June 6, 1944, photo, Allied troops crouch behind the bulwarks of a landing craft as it nears Omaha Beach in Normandy, France. The D-Day invasion broke through Adolf Hitler’s western defenses and led to the liberation of France from Nazi occupation just as the Soviet Army was making advances in the east, turning the tide of the war in the Allies’ favor. The Associated Press / U.S. Coast Guard

This June 6, 1944, file photo shows American soldiers of the Allied Expeditionary Force securing a beachhead during landing operations at Normandy, France.The Associated Press / Weston Haynes

U.S. soldiers from the 29th Infantry division, based in Fort Belvoir, Virginia, take part in a wreath-laying ceremony at the Omaha Beach memorial in Saint Laurent sur Mer, France, as part of the commemoration of the 70th D-Day anniversary.The Associated Press

Schoolchildren wave American flags during a ceremony in honor of the 29th Infantry Division, in La Cambe, France, Wednesday.The Associated Press

Ninety-four-year-old U.S. WW II veteran Steve Melnikoff, from Cockeysville, Maryland, who landed at Omaha Beach on June 7, 1944, with the 29th Infantry Division, participates in a ceremony in honor of the division, in La Cambe, France.

Eighty-nine-year-old U.S. WW II veteran Joseph Steimel of Indianapolis, who landed at Omaha Beach in 1944 with the 29th Infantry Division, shakes hands Wednesday with French Veterans, during a ceremony in honor of the division, in La Cambe, France.The Associated Press

A remembrance ceremony is held at Pegasus Bridge memorial in Benouville western France, Thursday June 5, 2014, as part of the commemoration of the 70th anniversary of the D Day. World leaders and veterans prepare to mark the 70th anniversary of the invasion this week in Normandy. (AP Photo/Remy de la Mauviniere)