Photograph by WikimediaUnited States, 39.76, -98.51939The Douglas DC-3 revolutionized air passenger transportation. Introduced in 1936, it carried up to twenty-eight passengers at a cruising speed of 170 miles per hour. It was the main passenger transport in the United States until it was replaced after World War II by the DC-4, DC-6, and DC-7.image/jpeghttp://rightsstatements.org/vocab/CNE/1.0/Airplanes--United StatesAirlines--United StatesFlightCloudsDouglas DC-3 (Transport plane)Douglas transport planesEastern Air Lines, inc.Douglas DC-3StillImage