There probably are no human-constructed aircraft that can fly within the atmosphere at Mach 23. The official record-holder of the fasted manned aircraft speed of Mach 6.72 (4,520 mph or 7,274 km/h) is the rocket-powered X15. An amazing fact is that the record has stood since 1963.
Mack Hillis was born on 1901-07-23.
Allison Mack was born on July 29, 1982.
As of the end of the 2013-2014 NFL season Khalil Mack is 23 years old.
Mack Allison was born January 23, 1887, in Owensboro, KY, USA.
Mack Stewart was born September 23, 1914, in Stevenson, AL, USA.
Mack Hillis was born July 23, 1901, in Cambridge, MA, USA.
Kevin Scott Mack was born on July 23, 1959, in Los Angeles, California, USA.
Mack Bates was born on March 23, 1977, in Hill Air Force Base, Clearfield, Utah, USA.
Ebony Jet Showcase - 1982 1987-01-23 was released on: USA: 23 January 1987
Ebony Jet Showcase - 1982 1987-10-23 was released on: USA: 23 October 1987
Ebony Jet Showcase - 1982 1992-10-23 was released on: USA: 23 October 1992
Ebony Jet Showcase - 1982 1986-05-23 was released on: USA: 23 May 1986