A review of research and development in guided missiles by the United States Air Force from 1919 to 1948. A GB-4 radio controlled bomb is suspended from a chain hoist in a work laboratory. This is a television controlled missile. Attaching television equipment to the bottom of missile. A B-17 takes off and is directly overhead. The B-17 in flight, GB-4 attached to its bottom. Interior of the aircraft shows television equipment as a bombardier prepares to drop a missile. The television equipment being put into operation. The B-17 drops the GB-4 missile. Interior of the aircraft shows the bombardier following the course of missile on the television equipment. GB-4 missile dives down towards a train. The locomotive moves across a flat open terrain. The missile hits the target area. The GB-4 missile dives towards a target building. It strikes the ground directly in front of the same and crashes through the building.

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