On June 6, 1944 – observed as “D-Day” - the Allied began a massive invasion of Europe, landing 156,000 British, Canadian and American soldiers on the beaches of Normandy, France. In response, Hitler poured all the remaining strength of his army into the Battle of the Bulge, the last major German offensive of the war.  Meanwhile in the Pacific, heavy casualties sustained in the campaigns at Iwo Jima and Okinawa, and fears of the even costlier land invasion of Japan led Truman to authorize the use of a new and devastating weapon – the atomic bomb – on the Japanese cities of Hiroshima and Nagasaki.  The Second World War was over, but at a tremendous cost to not only "The Greatest Generation," but the entire world.