U.S. Army Air Corps 1st Provisional Wing at an annual training in California, United States. U.S. Army Air Services LB-6 aircraft in formation flight. Aircraft in flight and the control aircraft flies above them. LB-6 bombers in flight.
U.S. Army Air Corps 1st Provisional Wing at an annual training in Sa Francisco, California. U.S. Army Air Corps A-3 aircraft taxi along a field and take off. Aerial views of San Francisco as A-3 aircraft fly above it. A-3 aircraft in formation flight above the Pacific Ocean off the coast of San Francisco. Aircraft in flight above the clouds. Brigadier General William Gillmore speaks into a microphone from cockpit of B-2 aircraft as he controls A-3 aircraft through radio.
U.S. Army Air Corps 1st Provisional Wing at an annual training in San Francisco, California. U.S. Army Air Corps P-12s, LB-6s, B-2s and A-3s in flight as they pass in review during the training. Aircraft in formation flight over the Mather field in California. Aircraft come in for landing at the field. P-12 aircraft land on the field and taxi along.
U.S. Army Air Corps 1st Provisional Wing at an annual training in California, United States. U.S. Army Air Corps World War I pilots pose in front of an aircraft before participating in maneuvers. Group of pilots including Captain Frank O.D. Hunter. A pursuit plane piloted by Captain Hunter in flight as it demonstrates aerobatic maneuvers. Aircraft rotates in mid air. A formation of LB-6, B-2 and P-12 aircraft in flight during the Air Corps exercise.
U.S. Army Air Corps 1st Provisional Wing at an annual training in San Francisco, California. U.S. Army Air Corps LB-6 aircraft lays a smoke screen at medium altitude. Puff of white smoke over the Mather field. Aircraft parked on the field as smoke spreads over it.
A training film about the means of forecasting avalanches in Alta, Utah. A snow ranger skies down a slope during testing. Incorrect and correct or safer ways of test skiing demonstrated. Explosives being used to set an avalanche in motion. Cables attached and a charge package of TNT (Trinitrotoluene) prepared. Fuse lit up with an igniter. A man throws the charge and explosion results in a crater indicating the least possibility of occurrence of an avalanche. Another man throws a charge and results in slab avalanche as snow breaks up in blocks. An electric cap being used to control time of detonation of explosive. A man throws the charge and a slab avalanche occurs as a result of a slide set on motion by the explosion. A man works on a projectile called avalauncher. Men work on the projectile and fire it at a slope.
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