Quiz: Historical X-Planes Flying Innovations

In 1945, the U.S. Air Force and the National Advisory Committee on Aeronautics launched a program to push the boundaries of aviation design. These experimental prototype planes were designed by the leading minds and companies in aviation engineering to ensure that the U.S. would remain at the top of advanced aeronautics research after World War II.
 
The goal of the X-plane program was to introduce new aviation technology that could be used for military or commercial aircraft. Innovations such as vertical takeoff, supersonic flight, and multi-propeller aircraft came out of the program.