Hypersonic sled sets speed of sound record.

The U.S. Air Force has successfully recovered a reusable hypersonic rocket sled for the first time after traveling at more than five times the speed of sound.

An announcement on June 2 reported the 846th Test Squadron at Holloman Air Force Base, New Mexico, were able to retrieve the vehicle following a recorded speed of 6,400 feet per second, or Mach 5.8.