U.S. President Barack Obama, center, and French President Francois Hollande, right, smile next to World War II veteran Kenneth "Rock" Merritt as they arrive for the official lunch at Benouville castle, in Normandy, France, Friday, June 6, 2014. World leaders and veterans paid tribute on the 70th anniversary of the World War Two D-Day landings to soldiers who fell in the liberation of Europe from Nazi German rule, as host France sought to use the event to achieve a thaw in the Ukraine crisis.
U.S. President Barack Obama, center, and French President Francois Hollande, right, smile next to World War II veteran Kenneth "Rock" Merritt as they arrive for the official lunch at Benouville castle, in Normandy, France, Friday, June 6, 2014. World leaders and veterans paid tribute on the 70th anniversary of the World War Two D-Day landings to soldiers who fell in the liberation of Europe from Nazi German rule, as host France sought to use the event to achieve a thaw in the Ukraine crisis. Regis Duvignau AP
U.S. President Barack Obama, center, and French President Francois Hollande, right, smile next to World War II veteran Kenneth "Rock" Merritt as they arrive for the official lunch at Benouville castle, in Normandy, France, Friday, June 6, 2014. World leaders and veterans paid tribute on the 70th anniversary of the World War Two D-Day landings to soldiers who fell in the liberation of Europe from Nazi German rule, as host France sought to use the event to achieve a thaw in the Ukraine crisis. Regis Duvignau AP