WRIGHT-PATTERSON AIR FORCE BASE, Ohio, Jan. 15 -- The U.S. Air Force issued the following news on Jan. 14: The Air Force Research Laboratory's X-60A program recently achieved a key developmental milestone with the completion of integrated vehicle propulsion system verification ground testing. The X-60A is an air-launched rocket designed for hypersonic flight research. It is being developed by Generation Orbit Launch Services under an AFRL Small Business Innovation Research contract. The goal o  more