Description:10 04 17 00 Archives, assembly better moments, 25 years ago. 1937. Trade-union demonstration in streets. Close-up men and woman who hold posters. " WPA, Works Progress Administration " Against economic measures. Strike also has Detroit, important city in car industry. Seen on factory, strikers in the windows which demonstrate. Want increase. Invention, prototype of a new mini plane. Close-up engine, cockpit. Takeoff of the plane with his nventor. The other takeoff of plane which leaves to find a plane which disappeared. Pilots show card with the place of the disappearance. Close-up pilots in cockpit.