Falcon booster landing
The Falcon 9 booster on the Dec. 21 launch completed its first flight with a droneship landing that was the 100th successful landing for a Falcon booster.

SpaceX launched a cargo Dragon spacecraft to the International Space Station early Dec. 21 and achieved a milestone for booster landings exactly six years after the first successful landing.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...