Fifty-one years ago at #EdwardsAirForceBase when #OTD, 3 Oct 1967 when Major William J. “Pete” Knight flew the modified X-15A-2 to a speed of Mach 6.72, the highest speed ever reached by a manned airplane. We hope you enjoy this video, produced in 1999 and narrated by then Edwards Historian Dr. Jim Young, which describes this historic event.