The U.S. Air Force's upcoming fifth and sixth satellites in its missile warning constellation will have a new satellite bus. CREDIT: Lockheed Martin.

Lockheed Martin Space Systems has received a $62.9 million contract modification from the Air Force to help develop the ground station for U.S. missile warning satellites.

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Mike Gruss is the chief content and strategy officer at SpaceNews. From 2013 to 2016 he was a senior reporter at SpaceNews covering military space. Previously, he was editor in chief of Sightline Media Group and worked as a reporter and columnist for...