Administrator of the National Aeronautics and Space Administration Michael Griffin (right) comments on the proposed plan to destroy an unresponsive U.S. reconnaissance satellite with an interceptor missile as it enters the Earth's atmosphere during a press briefing in the Pentagon on Feb. 14, 2008. Griffin, Vice Chairman of the Joint Chiefs of Staff Gen. James Cartwright (center), U.S. Marine Corps, and Assistant to the President and Deputy National Security Advisor Ambassador James Jeffries (left) discussed details of the planned operation.