But Doug Richardson, the editor of Jane’s Missiles and Rockets, examined the video for the Times of London and said he was left with little doubt.

"It’s a solid propellant missile," he told the Times. "You can tell from the efflux [smoke]."

Richardson said it could have been a ballistic missile launched from a submarine or an interceptor, the defensive anti-missile weapon used by Navy surface ships.
http://www.cbsnews.com/stories/2010/...n7040379.shtml