NASA prepares to assemble Ares I-X rocket

June 11 (UPI) -- Stacking is to begin this month for the Ares 1-X rocket -- the first time a new U.S. rocket has been assembled on NASA's mobile launch platform in 25 years. The National Aeronautics and Space Administration said the rocket's first flight test is to take place this summer at the Kennedy Space Center in Florida. The Ares 1-X forward assembly was moved Thursday from Kennedy's