X-37B OTV-4 landing
The X-37B on the Shuttle Landing Facility runway at NASA's Kennedy Space Center after a May 7, 2017, landing that ended a 718-day mission.

A secretive U.S. Air Force spaceplane landed in Florida early May 7 after spending nearly two years in orbit on a classified mission.

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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...