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JULY 19, 1963 - TODAY IN AVIATION HISTORY

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Joseph Albert Walker, the chief research test pilot for NASA, flew 25 times in the North American Aviation X-15A hypersonic research rocketplanes between 1960 and 1963. His 24th flight was the 90th of the X-15 program and the 21st for the Number 3 X-15, 56-6672.