they're not just swimming the whole time. they're climbing rock, getting out and walking, take the gear off. there's a lot of stages to the mission, much like climbing mt. everest. no one just walks to the top of it. reporter: retired thai navy s.e.a.l. died friday in the cave when he passed out from lack of oxygen. rescuers say it could take four days to rescue all nine of those left. trying to get it done before more heavy rains hit there. it is monsoon season in thailand, mike. mike: i cannot imagine what the parents are going through. you touched on the conditions in terms of being in a cave for two weeks, limited oxygen, limited food. what risks are we looking at for young soccer scomplars their coach? >> journalists are asking this all day, you did too, and infection is the biggest risk. a doctor checked on the boys and the coach in the cave, immediately applied iodine, an