These Are the Floating Airports of Our Dreams

The Avengers dazzled us with the airborne Helicarrier — but if some visionary designers had had their way, we could have had airplanes landing on structures high in the air. Airports raised above cities, airports floating on the water... the 20th century had many schemes, but no success. Check out some of the wildest… » 8/01/13 3:31pm 8/01/13 3:31pm