Elon Musk took a SpaceX submarine to Thai cave rescue

9:27 AM ET Tue, 10 July 2018

SpaceX CEO Elon Musk tweeted late Monday that he had “just returned from Cave 3,” likely in reference to Chamber Three, the rescue command center. Musk had delivered a submarine, named “Wild Boar,” to help rescue the boys’ soccer team. CNBC understands the submarine was only a backup option.