The aerial refueling aircraft used in Operation Epic Fury were created from a single $16 million Boeing prototype. See the 'Dash 80.'

The prototype for the 707, the Boeing 367-80, shown here, was named by the Smithsonian Institution as "one of the 12 most significant aircraft of all time." Museum of Flight Foundation/Corbis via Getty Images The Boeing 367-80 Jet Transport prototype led to the development of the Boeing 707 and KC-135. Known as "Dash 80," the Boeing 367-80 flew for the first time in 1954 and revolutionized air travel. Only one was ever built, and it lives at the National Air and Space Museum's Virginia locat...