In a Tuesday, Feb. 6, 2018 photo, Chris Kochling, NASA contractor, in training to be a flight controller, talks about NASA's Mission Control in Houston. (Steve Gonzales/Houston Chronicle via AP)
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In a Tuesday, Feb. 6, 2018 photo, Chris Kochling, NASA contractor, in training to be a flight controller, talks about NASA's Mission Control in Houston. (Steve Gonzales/Houston Chronicle via AP)
