Lasers destroy missiles, missiles shoot down satellites, and soon, satellites may tell both where to aim, as the United States successfully managed to track an entire ballistic missile launch from "birth-to-death" with its prototype Space Tracking and Surveillance System. After a year and a half in orbit, two Northrop Grumman-built satellites managed the feat last week, in what the company's calling "the Holy Grail for missile defense." While we're not reading about any plans to mount any lasers on the satellite's a