In this Jan. 11, 2018 photo provided by Virgin Galactic, the VSS Unity is released from the WhiteKnightTwo aircraft during a gliding test for SpaceShipTwo near Mojave, Calif. The spaceship isn’t launched from the ground but is carried beneath the special aircraft to an altitude around 50,000 feet (15,240 meters). There, it’s released before igniting its rocket engine and climbing. (Virgin Galactic via AP)
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