Rocket for Giant Satellite-Launching Stratolaunch Airplane Remains a Mystery

Vulcan Aerospace continues to assemble the world's largest aircraft at the Mojave Air & Space Port in California, but its builders are remaining mum about the Stratolaunch project's biggest mystery: What rocket will the air-launch system carry aloft to place satellites into orbit? At the 32nd Space Symposium in Colorado Springs earlier this month, Stratolaunch Executive Director Chuck Beames said he could not talk about the launch vehicle strategy yet, but he promised a series of announcemen