Description:05 41 07 00 United States. Archives, assembly better moments. 1936. Men look at model of New York with constructions, big works. Preparation of the next World Fair. Architect presents the works, the plans. Close-up on details of the model. Washington. Prototype, unusual invention of a small helicopter, landing. Crowd attends the demonstration. Man pulls down the folding wings. Then he rises inside and the conduit as the car. He runs on road.