Watch SpaceX land its 10th rocket for top secret mission

SpaceX has successfully launched its first national security mission for the US military. Not much is known about the payload except that it's a spy satellite. After launching the payload on Monday morning, SpaceX flew the first stage of its rocket back to a land-based site in Florida. This marks the tenth successful rocket landing for the company, and the fourth successful landing at this particular site. Other, past, landings have taken place on SpaceX's two drone ships — one based

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