Rocket Gun. Transportation in years to come will be depicted at New York World Fair next year. Rocket Port,picture! above will be possible development of future. From steamship docks and terminal buildings, elevators will whisk passengers to rocket car. A crane will pick up car, slide it smoothly into rocket gun. When in brilliant explosive flash,car will seem to travel to illuminated planets in ceiling of exhibit room. March 02, 1938. (Photo by Wide World Studio).