COLORADO SPRINGS, Colo. — Having completed construction and testing of the first of a new generation of super-secure military communications satellites, Lockheed Martin is preparing to submit a proposal to build the fourth spacecraft in the series, with an option for a fifth, a company official said.

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Warren Ferster is the Editor-in-Chief of SpaceNews and is responsible for all the news and editorial coverage in the weekly newspaper, the spacenews.com Web site and variety of specialty publications such as show dailies. He manages a staff of seven reporters...