The collapse of a planned $661 million Air Force and Missile Defense Agency project to develop an air-launched, guided missile interceptor that promised to chase down and destroy enemy intercontinental ballistic missiles immediately after launch was a "spectacular learning event" and a "good failure," according to a senior Pentagon official. Will Roper, the Air Force acquisition executive, said a breakdown in negotiations between the government and industry over contract terms for the Extended Range Weapon -- dubbed ERWn -- meant...