Comparison tests being performed between a British Centaur tank, a British Cromwell tank, and U.S. M-4 tank at the Aberdeen Proving Grounds in Aberdeen,Maryland. The three tanks are rolled onto various types of surface such as concrete, mud and sand to compare their maneuvering capabilities.
Sesquicentennial in Washington DC. Recounting of the development of Washington, DC. The Arlington Memorial Bridge built across the Potomac River in the year 1930. The Tomb of the Unknown Soldiers and Arlington National Cemetery Amphitheater. Construction of the Labor and Commerce buildings.
U.S. Chief Justice Charles Evans Hughes visits the White House in Washington DC. Chief Justice Hughes and other judicial members exit the building and pose for cameras. Line of a number of men including Justices. (1930 justices were: Harlan Stone, George Sutherland, Charles Evans Hughes, James McReynolds, Louis Brandeis, Pierce Butler, Willis Van Devanter, Benjamin Cardozo, Owen Roberts.)
Medium tractor on proving ground, Aberdeen. Medium tractor T-31 moves over muddy terrain. Tractor moves over terrain with and without 4.5 caliber gun on M-1 carriage.
Mortar carrier T-21 circles the field at Aberdeen proving ground. It moves over rough and level terrain. Soldiers open rear door revealing mortar. Soldier climbs into the carrier and inspects grenades and other equipment. (Note: The 4.2" M2 heavy mortar recoil was hard on the halftrack chassis so the T-21 was cancelled and never adopted.) (World War II period).
The working and techniques of the agents of the Federal Bureau of Investigation (FBI) in Washington DC. 'Identification Division Federal Bureau of Investigation' written on a cabin inside a building. Children in the cabin. A man recording the fingerprints of young children for their identification. View of destroyed houses and buildings due to a tornado. A young girl walking through ruins of a tornado-destroyed area. Brief view of flood waters passing homes. View of hundreds of panicked citizens in a city running in the streets and fleeing some unknown weather event or natural disaster. 1930s cars are in the streets also driving away from the disaster. Narrator discusses uses of fingerprints for identifying missing people and deaths following disasters.
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