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The new system is designed to give the military more communications capacity than the current Milstar system, and it is designed to resist jamming and survive attacks.

The Air Force said Lockheed Martin’s contract for its part of the project is valued at $7.8 billion and that the company’s “remaining award fee” would be reduced by $15 million because of the fuel line problem. The Air Force didn’t responded to requests for clarification, and Lockheed Martin declined to comment on the payment issue.