SpaceX launches 51 Starlink satellites, lands rocket at sea

Elon Musk-led SpaceX launched 51 of its Starlink internet satellites to orbit on Friday. The satellites rode atop SpaceX's Falcon 9 rocket, whose first stage successfully landed about 8 minutes and 40 seconds after liftoff on the SpaceX droneship stationed in the Pacific Ocean off the California coast. It was this Falcon 9 first stage booster's ninth launch and landing.