X-20 Dyna Soar on desert runway

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Three X-24A aircraft on a desert runway

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NASA X-15 aircraft on tarmac

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XB-70A takeoff with chase plane

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U.S. Air Force experimental aircraft

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X-15 aircraft in flight

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X-15 rocket plane in flight

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NASA F-15 in flight

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US Air Force aircraft in flight

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US Air Force jet in flight

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US Air Force tiltrotor aircraft in flight

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US Air Force C-17 over Hawaii

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