Vannevar Bush demonstrates his differential analyzer, a calculating machine at the Massachusetts Institute of Technology in Cambridge Massachusetts, United States. Views of the differential analyzer, which contains both vacuum tubes and mechanical components. A woman at a data entry machine while inventor Vannevar Bush points to a diagram that shows the machine's processing. Views of a rotating mechanical portion of the machine. A document containing the calculations being printed out by the early computer or so called "robot brain."
U.S. President Harry S. Truman in Washington DC, United States. President Truman seated at a desk as he talks to officials standing around him. The officials talk and laugh.
U.S. President Harry S. Truman in Washington DC, United States. Dignitaries seated around a dinner table chat while eating. Men and women around tables as they eat. President Harry S. Truman at a table. A woman smiles. Guests stand and clap.
United States Army engineers and troops construct a pontoon bridge in Manila, Philippines during World War II. A pontoon bridge across a river. Engineers inspect the bridge. The original bridge wrecked by the Japanese in the background. The engineers work on the bridge. They tie ropes on the new bridge over Pasig River. Filipino civilians waving and standing along the shore. Damaged buildings. Truckloads of troops cross the bridge. The Filipino civilians wave at them.
Okinawa during American occupation in World War II. United States Marines, seated around a table as they discuss restoration of agriculture in Okinawa. damaged buildings in the background. Occasional Okinawan passing by in background. Several children seen. Local farmers seated in a field as interpreter passes on instructions from Marines. Farmers get up and leave to commence harvesting crops.
United States attacks Japan during World War II. U.S. Army Air Forces B-29 aircraft parked on an airfield. B-29s fly in formation and bomb Japan. View of U.S. Navy fleet in waters nearing Japan. Close-up of Admiral Halsey. A U.S. Navy SB2C Helldiver aircraft, displaying tail code RR, from the USS Yorktown (CV-10), is seen in flight. The Navy bombards Hokkaido. Aerial view of the target area. The atomic bomb dropped on Hiroshima and then Nagasaki.