>> dana: right. there is a guy who was a cave diver who says that it is roughly 1.5 miles to get there, but it took them four hours to get through the water. >> they have their equipment on, but they can't see. shadow divers. it is a great book. these guys are superheroes, these divers. people who do this kind of rescue. it's an amazing story. i love looking at all of the details. they are in danger, but i think these kids are going to be okay. if you want to read a great book over the summer "shadow divers. it's about people, these divers who do this life risking kind of dives. >> kimberly: b...