Scott Crossfield in the X-15

A technician straps legendary test pilot Scott Crossfield into the cockpit of the X-15 rocket plane before an early test flight. The X-15\'s maiden flight occurred on June 8, 1959, during which Crossfield was carried aloft in his sleek, black rocket plane beneath the wing of a B-52 from NASA\'s Flight Research Center (now NASA Dryden). This was the beginning of nearly a decade of flight research that probed the hypersonic speed realm and altitudes at the edge of space.  Image Credit: NASA/North American Aviation

A technician straps legendary test pilot Scott Crossfield into the cockpit of the X-15 rocket plane before an early test flight. The X-15's maiden flight occurred on June 8, 1959, during which Crossfield was carried aloft in his sleek, black rocket plane beneath the wing of a B-52 from NASA's Flight Research Center (now NASA Dryden). This was the beginning of nearly a decade of flight research that probed the hypersonic speed realm and altitudes at the edge of space. Image Credit: NASA/North American Aviation