Q&A with Martin Halliwell, chief technology officer at SES

A previously-flown Falcon 9 booster blasted off Friday from Vandenberg Air Force Base on California’s Central Coast with 10 new-generation communications satellites for Iridium. Launch occurred 8:27 p.m. EST (5:27 p.m. PST; 0127 GMT).

Succeeding on a one-shot launch attempt before Hurricane Irma shuts down the Cape Canaveral spaceport, a SpaceX Falcon 9 rocket thundered into orbit Thursday with the U.S. Air Force’s X-37B spaceplane, a reusable robotic mini-shuttle that could stay aloft for years with clandestine on-board experiments.

Crew Dragon astronauts Douglas Hurley and Robert Behnken thanked their space station crewmates for a productive two-month visit, readied their SpaceX capsule for departure and stood by for a final “go” from flight controllers to undock Saturday night, setting up a Gulf of Mexico splashdown Sunday afternoon.