An artist’s illustration of DARPA’s Hypersonic Technology Vehicle 2 (HTV-2) travelling at 13,000 mph, or Mach 20, during its Aug. 11, 2011 test flight.
Hypersonic Test vehicle 01
An artist’s illustration of DARPA’s Hypersonic Technology Vehicle 2 (HTV-2) travelling at 13,000 mph, or Mach 20, during its Aug. 11, 2011 test flight.
జాతీయ అంతర్జాతీయ వార్తలు, విశ్లేషణ 
