Lockheed Martin today received a $500 million modification to its contract for the development and demonstration phase of the Air Force's Advanced Extremely High Frequency system. AEHF is the Pentagon's next-generation satellite communications system. In an announcement today, the Defense Department said Lockheed Martin has been granted a $498 million modification to an AEHF letter contract signed last November. The purpose of the modification is to increase the not-to-exceed limit of the contract from $2.6 billion to $3.1 billion, DOD...