In this July 2, 2021 photo provided by John Kraus, from left, Sian Proctor, Chris Sembroski, Jared Isaacman and Hayley Arceneaux pose for a photo at Duke Health in Durham, N.C, during hypoxia training to understand how each crew member reacts in a low-oxygen environment. (John Kraus/Inspiration4 via AP)
SpaceX launches 4 amateurs on private Earth-circling trip

In this July 2, 2021 photo provided by John Kraus, from left, Sian.