Explores the D-Day invasion, Operation Overlord, conducted by the United States, Great Britain, and Canada on June 6, 1944, highlighting the vast amount of secrecy and years of planning it took to design and finally launch Operation Overlord. Discusses the contribution to the operation of figures like President Franklin D. Roosevelt, Prime Minister Winston Churchill, and General Dwight D. Eisenhower, as well as the important work done by African Americans, women, service members, commanders, and journalists that proved critical to the success of D-Day.