| http://www.w3.org/ns/prov#value | - 000 hours in more than 60 types of aircraft, ranging from helicopters and sailplanes to the hypersonic X-15, which he flew to a maximum altitude of nearly 59 miles, reaching a top speed of 3,897 mph.In 2005, he was awarded civilian astronaut wings for two of those flights to the edge of space ??? nearly 40 years after his X-15 flights ??? because at the time, NASA did not confer astronaut wings on
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