Video: Missile alert satellite launches atop Atlas 5

Two more Beidou navigation satellites launched from China on Sunday, ending a record run of 18 satellite deployments this year for the Chinese alternative to GPS and placing the program on the cusp of expanding to full-time coverage over most of Asia, Africa and Europe.

Lockheed Martin, the largest U.S. defense contractor, announced late Sunday that it has reached a deal valued at $4.4 billion to acquire Aerojet Rocketdyne, a supplier of engines to NASA’s Space Launch System moon rocket and United Launch Alliance’s Atlas, Delta, and Vulcan rockets.

The U.S. Space Force says it will launch two GPS navigation satellites on reused Falcon 9 boosters next year through a restructured contract with SpaceX that saved taxpayers $52 million, the first time the military has agreed to fly operational national security payloads on previously-flown rockets.