Concrete runways make possible larger planes. The first commercial leader is the Lockheed Constellation. Pressurization transforms civil aviation. Propeller engines give way to jet engines.
Flight 1 from New York to Los Angeles arrives, the cleaning crew and all ground crew go to work to prepare the flight for its return trip. Safety precautions cause delays in check-in procedures.
Having flown across the U.S., American Airlines Flight 1 is 28 tons lighter than when it left, and burned $18,000 worth of jet fuel. The flight cost the airline $53,000, and earned the airlines $200.
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