Astronauts Nicole Mann, right, and Eric Boe, left, bump fists in front of Christopher Ferguson after being introduced during a NASA event to announce the astronauts assigned to crew the first flight tests and missions of the Boeing CST-100 Starliner and SpaceX Crew Dragon, Friday, Aug. 3, 2018, in Houston. The astronauts will ride the first commercial capsules into orbit next year and return human launches to the U.S. (AP Photo/David J. Phillip)
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