The operation and uses of the radar in the United States. An enemy plane comes in the range of radar detection. The receiving antenna detects entry of a plane. A search light pinpoints at the plane. Guns fire. The plane on fire. It drops down. Radar used at ports. A plane in flight. It looses altitude. A ground control man guides with accurate information and helps the pilot to land safely. Gauges show altitude and other readings. (World War II period).
Dropping of a Mark 25 Aerial mine in Japan. 21st Bomber Command base at an island in the United States. The Mark 25 mine at the base. Hydro static devices, an extender and a clock delay mechanism. Mines loaded onto B-29 planes. They are dumped on trailers and a parachute is attached to after end. Explosive charge, the extender and the clock mechanism are put in a safety lock. A water soluble washer is attached. An officer specify an enemy area on a map. Group commanders are briefed. A B-29 plane takes off. The bombing door opens on the target. The mine is dropped. The parachute opens. The mine drops in water. (World War II period).
The K-25 Plant (Carbide and Carbon Chemical Corporation) area in Oak Ridge, Tennessee. Buildings at the plant. Smoke rises from a train which passes through the area. The Power House (K-25). A police car drives past in the foreground. A board reads 'safety first always and more power to you'. A restricted area and other information written on a sign board.
The Y-12 Electro Magnetic Plant in Oak Ridge, Tennessee. A board reads 'Tennessee Eastman Corporation', ' Employment Office' and other information. Vehicles drive past on a road. Workers leave the plant after the day's work. People walk and are searched by a guard. The workers sit in a bus. Buses leave a parking area.
The X-10 Plant of Monsanto Chemical Company in Oak Ridge, Tennessee. Vehicles drive towards the plant. A parking area of the plant. A car comes at the entrance gate of the plant. A guard at the gate. People leave from the exit gate of the plant. A sign of Monsanto Chemical Company. A guard enters. Clinton Laboratories of the plant. A sign reads 'Prohibited Area'. Smoke stacks in the background. Important information on a board.
An accounting department at an administration building in Oak Ridge, Tennessee. A man gives papers to a girl. She goes away. People work at a desk. Mr. Frank B. Elackston, the Chief Accountant, dictates to his secretary at his desk. Engineers work in a drafting room in the Engineering Section. Two men work at a drafting desk. A soldier hand prints a name on a blueprint at a desk.
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