https://techcrunch.com/2018/07/07/elon-musk-says-spacex-is-working-on-a-kid-size-submarine-to-extract-those-boys-in-thailand/

Over the last couple of days, serial entrepreneur Elon Musk has been tweeting about how to potentially help the 12 young soccer players and their coach who’ve been trapped in a cave in Thailand since entering it June 23rd, after which they became trapped by rising floodwaters.

Now, suggests Musk, working with cave experts in Thailand, Musk and engineers from his rocket company, SpaceX, have decided on the “primary path” to attempt to freeing the group: a “tiny, kid-size submarine” that uses the “liquid oxygen transfer tube” of SpaceX’s Falcon rocket as hull.