United States Anti Aircraft guns ready for use in a coastal area in case of air raid during World War 2. Anti aircraft gun crew man their positions to meet an air raid. Dwellings and haystacks give way to anti aircraft gun hidden under coverings that camouflage them. Roofs of houses being removed as guns are raised. A roof top tennis court moves to the side as an anti aircraft gun is raised.
Weapons being manufactured and tested in the United States during World War II. Women manufacture Bofors anti aircraft gun at a plant in Akron, Ohio. Men and women work on various parts of the Bofors gun. Bofors gun lined up at the plant. A one thousand pound bomb being tested at Aberdeen Proving Grounds in Maryland. Men push the bomb on a trolley. Bomb being loaded under the wing of an aircraft. Aircraft in flight. A bomb isdropped and it impacts causing billows of smoke to rise up. Another bomb being released and it hits the ground. Billows of smoke rise up.
A documentary 'Avalanche to Order' about the dangers posed by avalanches in the mountainous regions of the United States. Snow covered mountains as men and women ski along the slopes. A man ski down a slope. An area affected by Avalanche in Alta, Utah. Aftereffects of the avalanche like uprooted trees. Army personnel arrive for rescue work in the area. Machines being used to clear snow from an area. Dozer pushes the snow and rotary blows it up. Men clear the snow with shovels. A wrecked car being recovered from under the snow.
A documentary about the dangers posed by avalanches in the mountainous regions of the United States. A figure about the avalanche angles depicting the anger of avalanche to be high at slopes above 40 degrees. Avalanche terrain at Mount Superior in Alta, Utah. Snow covered Halgate cliff. A figure depicts the avalanche fracture points on straight, convex and concave slopes. An avalanche comes down a slope. Snow water falls down a cliff and gives boost to its velocity. A snow covered house. A man walks on a snow covered surface. Snow waves blow from a mountain peak. A snow storm blows above a canyon. A figure depicts various weather factors that cause avalanche like rate of fall, wind force, temperature and wind direction.
A documentary about the dangers posed by avalanches in the mountainous regions of the United States. A snow stake being used to measure th depth of snow. Reading shows 11 feet depth of snow. Heavy snow fall takes place. Snow stakes shows the reading of fresh snow fall as 2 feet. Wind force being measured with the help of anemometer. Strong wind blows during snow fall. A man on ski board as he climbs up a slope. Wind wane indicates the wind direction. Snow load along the slope. A vehicle covered with snow. An avalanche plunges down a mountain.
A documentary about the dangers posed by avalanches in the mountainous regions of the United States. A snow ranger works on past records and data to predict the occurrence of avalanche. A hydrothermograph. A ranger crushes snow and blows it up. Another ranger checks for unsettled snow. A ranger checks for damp snow on a car to predict an avalanche. A ranger skies down a slope. He hits at fracture points to check out the possibility of an avalanche.
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