A 1 manned, rocket propelled air/spacecraft that can go over the Von Karmen line(space).
The x-15 is the shit because it can go into space.
A plane in which Chuck Norris made and flew after watching and being inspired by the movie "Top Gun."
But seriously now, the North American X-15 is, to date, the fastest and highest-flying aerodynamically supported machine ever built.
Compared to the SR-71 Blackbird, the X-15s closest rival, in these catagories:
------Top speed--Highest altitude
SR-71__Mach 3_______89,000 ft.
X-15__Mach 6.72____354,200 ft.
Person 1: You know that the X-15 burned more than 16.5 tons of rocket fuel in 3 minutes on its record breaking flights?
Person 2: Damn, that truely is Chuck Norris' kind of plane.