WRIGHT-PATTERSON AIR FORCE BASE, Ohio, March 7 -- The Air Force Research Laboratory's Materials and Manufacturing Directorate issued the following news: By Barry Hellman Public Affairs The Air Force Research Laboratory, Aerospace Systems Directorate, High Speed Systems Division, in partnership with Generation Orbit Launch Services, Inc., is developing the X-60A vehicle. It is an air-dropped liquid rocket specifically designed for hypersonic flight research. X-60A program completed its Criti  more