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Final members of SpaceX Inspiration4 crew revealed exclusively on TODAY

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The final two members of the all-civilian crew of SpaceX Inspiration4, chosen among contributors to St. Jude Children’s Research Hospital, are revealed at the Kennedy Space Center in Florida: Chris Sembroski, an Air Force veteran now working in the aerospace industry, and Sian Proctor, a pilot and science professor. NBC’s Tom Costello reports for In Depth TODAY.