Federal Bureau of Investigation (FBI) agents investigate cases through scientific methods in the United States. Four knives used in a crime are placed on a table. Minute particles of zinc and copper on the knives are inspected. A man examines the sample. Men examine the guns used in a crime. A gun is fired and then examined. A man looks at the sample through a microscope. Other man seated nearby examines other sample.
Federal Bureau of Investigation (FBI) agents undergo their training in the United States. A field training for the agents. They fire rifles at target boards. The training continues in night. The agents fire rifles and hit the target boards at night. FBI Director John Edgar Hoover addresses the nation and talks about the goal of eradication of crime from the country.
Manufacture of United States Army Air Force Martin B-26 Marauder medium bombers in the United States during World War II. Men working in a factory. They work on the production of B-26 aircraft. Different parts of the aircraft lined up to be completed inside the factory. Men work on the parts of the aircraft. They work on the wing section, the tail section and the landing gear parts of the aircraft.
Manufacture of United States Army Air Force B-26 Marauder medium bombers in the United States during World War II. Men working in the factory. They weld parts of airplanes. They wear eye glasses to protect their eyes from any damage while welding. They weld important parts of the aircraft carefully for the safety of the airplane in flight.
Manufacture of United States Army Air Force B-26 Marauder medium bombers in the United States during World War II. Tiny equipment, rivets and other control parts of aircraft lying on a table. A man works on the parts. He photographs the parts with the help of a machine to find out any defect in them. He inspects the parts.
Manufacture of United States Army Air Force B-26 Marauder medium bombers in the United States during World War II. Production of small parts which are to be installed in the aircraft. The small parts are produced by small manufacturers throughout the country. They are brought to the main industry after they are completed to be installed in the aircraft. Men work on different parts of the aircraft. They work on the nose, the central and the tail part. They work on the fuselage of an aircraft. They install the small parts in the aircraft. They attach wires and cables in the airplanes.
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