The 1960s ushered in the Space Age. The Test Pilot School was re-designated as the Aerospace Research Pilot School as it began to train future astronauts. The North American X-15 arrived and began to explore hypersonic and exoatmospheric flight. Major Robert "Bob" White became the first person to fly an aircraft into space on 17 July 1962 when he flew his X-15 to an altitude of 314,750 feet. Flying the same airframe a year later Joe Walker reached an altitude of 354,200 feet (67 miles). On 3 October 1967 William "Pete" Knight set the standing aircraft speed record of Mach 6.72 (4,520 mph), again flying an X-15. When the space program began a number of astronauts were selected from the Air Force's test pilot cadre. Additionally, the AFTC assisted with the testing of rocket engines and re-entry vehicles.