what is the fastest plane in the world called?need answers now!!!!

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With that caveat, we can still attempt an answer. If having a pilot on board is not a criteria, then the X-43 is said to be the fastest airplane in the world. The X-43 is an unmanned scramjet, which launches not from the ground but from a B-52 at about 40,000 feet (12.2 kilometers) in the air. On 16 November 2004, the X-43 reached Mach 9.6 (7,000 miles or 11,265 kilometers per hour) according to NASA. Some claim that it reached Mach 9.8.