Video: Saturday’s SpaceX launch

Days after SpaceX opened preorders for Starlink internet service, two more Falcon 9 rockets are set to launch from Florida’s Space Coast as soon as Sunday night and Wednesday morning — weather permitting — to help push the network closer to commercial operations.

SpaceX’s Dragon cargo craft ended a four-week mission Sunday with a parachute-assisted splashdown in the Pacific Ocean, returning from the International Space Station with more than 3,600 pounds of cargo, blood and urine samples, and specimens from a rodent research experiment aimed at helping patients with catastrophic bone injuries and osteoporosis.

A SpaceX Falcon 9 rocket is being readied for launch with a classified payload for the National Reconnaissance Office early Sunday, the commercial launcher’s 33rd overall flight, and first dedicated to a U.S. government national security mission.