Boeing 707
The 707 evolved from the 367-80, or "Dash 80," the prototype for the U.S. Air Force's KC-135 tanker. At Pan Am's insistence, the 707 was made 10 centimeters (4 inches) wider so it could carry 160 passengers in six-across seating.
Gift of Trans World Airlines
This object is on display in America by Air at the National Air and Space Museum in Washington, DC.