A second flight was launched on 11 August 2011. The unmanned Falcon HTV-2 successfully separated from the booster and entered the mission's glide phase, but again lost contact with control about nine minutes into its planned 30-minute Mach 20 glide flight. Initial reports indicated it purposely impacted the Pacific Ocean along its planned flight path as a safety precaution.Rosenberg, Zach. "DARPA loses contact with HTV-2" . Flight International, 11 August 2011."DARPA HYPERSONIC VEHICLE ADVANCES TECHNICAL KNOWLEDGE" . DARPA, 11 August 2011.Norris, Guy. "Review Board Sets Up to Probe HTV-2 Loss" . Aviation Week, 12 August 2011. Some analysts thought that the second failure would result in an overhaul of the Falcon program.. BBC NEWS, 11 August 2011.
