This US Defense Advanced Research Projects Agency (DARPA) artists rendering shows the Falcon Hypersonic Technology Vehicle 2 (HTV-2). US weapons researchers are looking to develop missiles moving more than five times the speed of sound, with arms giant Raytheon getting the initial $20 million development contract. The first flight tests are expected within two to four years. Existing ballistic missiles... 

This US Defense Advanced Research Projects Agency (DARPA) artists rendering shows the Falcon Hypersonic Technology Vehicle 2 (HTV-2). Technical complication has resulted in the termination of a mission to test a US hypersonic weapon and the destruction of the weapon itself. The weapon, known as the Advanced Hypersonic Weapon, which was developed by Sandia National Laboratory and the US Army, is part...