Elon Musk visits Thai cave where boys are trapped, delivers kid-size submarine – just in case

American space entrepreneur Elon Musk tweeted that he was in Thailand on Tuesday with a prototype mini-sub, at the flooded cave where five members of a youth football team remained trapped.
“Just returned from Cave 3,” Musk said.
“Mini-sub is ready if needed. It is made of rocket parts & named Wild Boar after kids’ soccer team. Leaving here in case it may be useful in the future.”
On Instagram, he published video of a flooded cave, with rescuers.
Cave Three is…