2 HWS contract in 2004, to develop technologies further and reduce technology risk on the program. Follow-on hypersonic program Following the Phase 2 contract, DARPA and the US Air Force continued to develop the hypersonic vehicle platform. The program was to follow a set of flight tests with a series of hypersonic technology vehicles. The FALCON project includes: X-41 Common Aero Vehicle (CAV): a common aerial platform for hypersonic ICBMs and cruise missiles, as well as civilian RLVs and ELVs. Hypersonic Technology Vehicle 1 (HTV-1): a test concept, originally planned to fly in September 2007, now canceled. Hypersonic Technology Vehicle 2 (HTV-2): first flew on 22 April 2010, but contact was lost soon after booster separation HTV-3X: Blackswift, now canceled The Hypersonic Cruise Vehicle (HCV) would be able to fly 9,000 nautical miles (17,000 km) in 2 hours with a payload of 12,000 lb (5,500 kg). It would fly at a high altitude and achieve speeds of up to Mach 20. Blackswift The Blackswift was a proposed aircraft capable of hypersonic flight designed by the Lockheed Martin Skunk Works, Boeing, and ATK. The USAF states that the "Blackswift flight demonstration vehicle will be powered by a combination turbine engine and ramjet, an all-in-one power plant. The turbine engine accelerates the vehicle to around Mach 3 before the ramjet takes over and boosts the vehicle up to Mach 6." Dr. Steven Walker, the Deputy Director of DARPA's Tactical Technology Office (acting Director as of January, 2017), will be coordinating the project. He told the USAF website, The Falcon program has announced the hypersonic horizontal take-off Blackswift/HTV-3X. It is also launching the HTV-2 off the top of a rocket booster. Falcon seems to be converging from two directions, on the ultimate goal of producing a hypersonic aircraft which can take off and land from a runway in the US, and be anywhere in the world in an hour or two. Falcon is methodically proceeding toward a Hypersonic Cruise Vehicle. Dr. Walker stated, In October 2008 it was announced that HTV-3X or Blackswift did not receive needed funding in the fiscal year 2009 defense budget and had been canceled. The Hypersonic Cruise Vehicle program will continue with reduced funding. Flight testing DARPA had two HTV-2s built for two flight tests in 2010 and 2011. The Minotaur IV light rocket is the booster for the HTV-2 with Vandenberg Space Force Base (known as Vandenberg