The Air Force plans to buy eight prototypes of the Air-launched Rapid Response Weapon -- the service's flagship hypersonic missile that's under development -- according to a new report. The Government Accountability Office released a report today stating the service will purchase four ARRWs to conduct flight tests and four spares -- quantities that were not previously disclosed. Lockheed Martin is building the boost-glide hypersonic weapon for the Air Force. An initial flight test is scheduled to occur in October...
