forecast is going to change. this is july in thailand, and this is the rainy season. so it is going to start raining. those water levels will start rising. so when we talk about that window of opportunity, this is it. this is when the decisions have to be made because when it starts raining, as we saw when they first got trapped in the beginning, john, those waters can rise extremely quickly. so now is the time to make a decision. some of those rains in the forecast for as soon as monday. that s why they re watching so carefully. matt rivers, great to have you on the ground for us. we ll check back in next hour. back in the united states, there are divers who train over and over for rescues like this. an up close look at some extreme dangers with gary tuchman in a cave in utah. i walk in 40 degree water with two of the preeminent cave divers in the united states. sergeant wendell knope and richard lamb. we re in northern utah s logan can kbron and a cave system