Representatives of three nations, seated around table at Potsdam Conference held at Cecilienhof in Potsdam, Germany. British prime minister, Clement Attlee; President of United States, Harry Truman; and representative of Soviet Union, Joseph Stalin at the Potsdam Conference, July 1945. They deliver an ultimatum of unconditional surrender to Japan. Swarms of B-29 bombers and Aircraft Carrier Task Forces destroy Japanese homeland. Planes on carrier decks.Navy Grumman carrier-based TBF aircraft dropping bombs.. Destruction of ships at sea. Mushroom cloud due to atomic bombing. Chart depicts the power of one atomic bomb. Britain's 'grand slam' bomb, most destructive conventional bomb ever produced. Doctor Ernest Orlando Lawrence, inventor of the cyclotron (atom smashing machine). A man works at the Cyclotron at the University of California, Berkeley. General Leslie Groves, head of the project speaks. He is seated with Dr Vannevar Bush, government director of science and research, and Dr Richard Tolman, technical expert. Quantities of uranium shipped from Alberta, Canada are used in bombs. The atomic bomb process (Manhattan Project) is developed in widely separated areas; scenes from Hanford Project plant in Richmond, Washington. Project personnel exit cars and enter into the search area. Lieutenant colonel Franklin T Matthias with the army corps of engineers, appointed to the Hanford Project. Sign of 'Oak Ridge' in Tennessee. Largest of the three atomic bomb plants located near the TVA dam. Employed personnel in atomic bomb plants. Man and woman employees at the plan read a Knoxville Journal newspaper in August 1945 with headline "Power of Oak Ridge Atomic Bomb hits Japs". View of dense prefabricated home communities to house large number of Oak Ridge plant workers. View of families setting up their houses in trailer towns after the prefabricated homes were full. People come out from the Henebry's Jewelers and super market. Joseph Stalin at conference. Russian artillery and troops in a parade at Red Square in Moscow, Russia (these parade scenes are from the May 1, 1945 May Day parade, just days before Germany's surrender). President Harry Truman reports on the latest developments regarding the war with Japan. He states that the United States is prepared to destroy every productive enterprise in Japan and the U.S. shall completely destroy its power to make war. He warns of an attack by the U.S. due to the rejection of the July 26th ultimatum at Potsdam. He warns that Japan "should expect a rain of ruin from the air; the like of which has never been seen on this earth." Truman notes that it will be followed by an unprecedented sea and land invasion of Japan.
Film opens showing people in an American city (possibly Chicago) celebrating the Allied victory over Japan on VJ Day, August 15th, 1945. Scene shifts abruptly to Chicago, Illinois, where French General Charles de Gaulle is seen saluting in a reviewing stand at Victory Plaza near Lasalle Street entrance to City Hall. (On August 24th, he had accepted an invitation from Mayor Edward Kelly to stop in Chicago on August 27-28, 1945, during his visit to the U.S. and Canada.) Next, general de Gaulle and Mayor Kelly are seen in an open car in a motorcade amidst crowds of well-wishers. Enthusiastic spectators run along side their car. Glimpse of a dense crowd of people, including a contingent of sailors in dress whites. Final scene shows General de Gaulle speaking with reporters and photographers near a sign reading "W-G-N." (A Chicago radio station).
Atomic bomb production and its use in the United States. Doctor Ernest O. Lawrence experiments with the cyclotron at the University of California, Berkeley. View of the exterior and interior of the cyclotron. An animated diagram shows the results of the splitting of the uranium atom. Diagram shows a nucleus, electrons and protons. Atomic structures of Helium, Lithium and Uranium. A diagram of the creation of barium and krypton, and the release of atomic energy. Aerial and ground views of Y-12 atomic energy testing, uranium enrichment, and manufacturing plant at Oak Ridge, Tennessee. Workers walking on the grounds of the the plant. The Trinity Shot first atomic explosion is shown near Los Alamos, New Mexico on July 16, 1945. Flash of explosion and a cloud of smoke rises as seen from U.S. Army cameras 6 miles away. Two other views of the explosion are seen from other camera positions while narrator explains the effects. U.S. President Harry S. Truman speaks of the need to keep the secrets of the atomic bomb among the U.S., the U.K, and Canada, alone, until they find successful techniques to control the bomb and protect the world from total destruction. He indicates that he will work the the U.S. Congress in the effort and make the power a force for world peace. Truman asks that God guide the U.S. in how to use the technology in His ways and for His purposes.
Film clip shows workers surrounding a completed B-29 bomber parked on ramp of what appears to be the Boeing plant on Sea Island, Canada. Film clip reads:"Canada Builds B-29s for U.S." (Note: Boeing of Canada, headquartered at Vancouver, B.C., built a huge manufacturing factory on Sea Island to build aircraft for the war effort. In 1944 Boeing began to manufacture the mid-sections of B-29 fuselages there, including bomb bays for the bomber. These sections were then trucked to Renton, Washington where they were incorporated into final assembled aircraft. However, this clip shows a fully assembled B-29 that may have been flown here for something like worker morale purposes.)
Toronto Rehabilitation Training Center in Canada. Canada's ex-servicemen learn profitable trades after World War 2. Veterans are taught carpentry, using hammer and nails. A veteran learning brick laying has his work checked using a level. Veterans being taught machining operate lathes. One veteran in a wheel chair does not have legs. Barber classes for Canadian veterans. A student barber practices shaving using a straight razor on a balloon. The balloon explodes, covering his face with foam.
War anniversary celebrations in Canada. Officers escort an official at a ceremony to mark the anniversary of the Canadian War. Official reviews troops. An official places a wreath at a memorial. Officers salute at the ceremony.