At the Smithsonian NASM It is among the most famous aircraft The "Spirit",the X-1 and the X-15, which also went into space and flew back. 4/19/2006: Scott Crossfield, the first man to fly mach 2 and was the North American X-15 test pilot was killed when his private plane crashed in Georgia on way to Virginia. Thunder storms were in the area. He flew the first non-and-powered X-15 flights. He landed very hard on its first flight when an adjustment made the pitch too sensitive, an engine fire forced the X-15 to land too heavy with fuel and it broke on landing between the cockpit and the fuel tank, an explosion during a static test of the XLR-99 engine threw the cockpit forward at 80G's. He helped design it.