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Aviation/Selected picture/51
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From Wikipedia, the free encyclopedia
<
Portal:Aviation
|
Selected picture
North American X-15
Credit:
http://www.edwards.af.mil/history/docs_html/aircraft/x-15.html
Flying a modified
X-15
A-2 in October, 1967, US Air Force Major
William Joseph Knight
reached Mach 6.72 (4,520 mph), which remains the highest speed ever attained in an airplane.
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