before and they leave those lines permanently and try to go add line to that. once the lines are in, cave divers can follow them. that's the road map back. these guys love what they do. they would rather be with a cave on their back and on their stomach in a tight little place crawling through the underground than any place else that's comforting to them because they're trained how to do this. kids are not, all right? so that is -- that was the big factor. when you say what's different about this? cave divers do not go in caves without knowledge and training. so, the situation is unique because you never plan for giving someone who has no experience, 11 years old, out of the cave situation. who would ever do that and think of that? >> tim, sanjay, thanks very much. appreciate you being here. we are hearing that president trump is speaking on the south lawn at the white house right now. he's getting ready to go to brussels for the nato summit.