From the British Ministry of Information. This is a film about an engineering feat put about by the British army: before and during the Normandy Invasion of June 6, 1944, Allied forces built a series of floating causeways and bridges in the English Channel, creating a man-made harbor (code named 'mulberry'). MS of Winston Churchill seated and working at a desk. CU of a special memo on his desk written in 1942 expressing need to build harbor. LSs Harbor being built along coastline, nice shot w/blimp hovering is seen. Establishing view of Chateau Frontenac in Quebec City, Quebec. MS of Churchill and Franklin D. Roosevelt talking at Conference.