Fifty-first Annual Reunion of the Harlem Wheelmen's Association in the Central Park. Several people seen riding velocipede 'big-wheel bikes' and 'bicycle built for two'. Crowd seen in the park watching the unusual collection of bicycles. Various other odd foot propelled vehicles and bikes are seen.
United States Forest Service reveals mechanized 'Mountain cat' snow plow. It speeds through and clears the roads and highways of Montana Roads.
A film titled 'Lieutenant Foulois and Orville Wright make the first cross country flight. Fort Myer to Alexandria, Virginia and return'. Orville Wright along with Lieutenant Benjamin Foulois prepares to make first cross country flight. They climb into the seat of the plane. Men aboard plane.
A sign reads 'Road closed'. View of a U.S. Air Force B-47 jet like the one that experienced a bomb shackle malfunction, causing the release of an atomic bomb, which fell to the ground in Florence South Carolina. Bomb was not assembled for firing so atomic blast occurred. View of wrecked house of Walter Greg, struck by the bomb. A deep 35 foot pit is formed on the land. Men inspect the damage. Air Force keeps a vigil reviewing the skies and ground for any evidence in the case.
A sign reads 'Escape Training Tank'. U.S. Navy's Submarine school in Pearl Harbor teaches underwater escape techniques. Trainees control their breadth before entering the compartment. Trainees leave a flooded compartment in a submarine fifty feet below the surface.
An atomic blast in a tunnel in Nevada. Men enter a tunnel. A sign reads 'Danger, Do not enter without proper authorization'. The atomic bomb blast makes news with the disclosure that the shock was detected in Alaska over 2000 miles away. Men wearing helmets and shoe coverings inspect and make observations in the tunnel. A man passes a geiger counter near a tunnel wall spray painted with writing, "Seismometer site."
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