The Douglas DC-3 was one of the most successful airliners in history. The aircraft?s efficiency, speed, and safety popularized air travel. It was the first airliner able to profit only from carrying passengers. Highlight in this image are the propellers and engines of a Douglas DC-3 that flew more than 56,700 hours with Eastern Air Lines. Its last commercial flight was on October 12, 1952, when it flew from San Salvador to Miami.