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1961 Richard Donner test pilot rocket airplane aviation outer space science fiction (sci-fi) thriller "The North American X-15 rocket plane was part of the USAF/NASA/USN X-series of experimental aircraft, including also the Bell X-1. The X-15 set numerous speed and altitude records in the early 1960s, reaching the edge of space and bringing back valuable data that was used in the design of later aircraft and spacecraft. It could be considered the first manned suborbital spacecraft ever flown"