The 70th Anniversary of D-Day

World War II veteran of the U.S. 29th Infantry Division, Morley Piper, 90, salutes during a D-Day commemoration, on Omaha Beach in Vierville sur Mer, France, June 6, 2014.

U.S. President Barack Obama and French President Francois Hollande look out at Omaha Beach, one of the sites of the Allied landings, at Normandy American Cemetery in Colleville sur Mer in Normandy, France, June 6, 2014.

U.S. President Barack Obama and French President Francois Hollande walk by veterans and participants at a D-Day ceremony at the Normandy American Cemetery and Memorial in Colleville-sur-Mer, France, June 6, 2014.

U.S. President Barack Obama and French President Francois Hollande stand with veterans during the playing of Taps, at Normandy American Cemetery at Omaha Beach in Colleville sur Mer, Normandy, France, June 6, 2014.

U.S. President Barack Obama and French President Francois Hollande stand with veterans during a fly over of the Normandy American Cemetery, at Omaha Beach in Colleville sur Mer in Normandy, France, June 6, 2014.

Australia's Prime Minister Tony Abbott places a cross at the British War cemetery in Bayeux, Normandy, France, June 6, 2014.

Britain's Queen Elizabeth pays her respects after laying a wreath during the French-British ceremony at the British War cemetery in Bayeux, Normandy, France, June 6, 2014.

Queen Margrethe of Denmark lays a wreath in front of a war memorial, as part of D-Day commemorations, at Sainte Marie du Mont, France, June 6, 2014.

A military enthusiast takes a snapshot of Omaha Beach, France, June 6, 2014.