or fried chicken, if you haven't eaten anything solid in the last 16 days. so we're hoping in the next couple of days, these very strong, very brave young men are going to get the fried chicken they've been asking for. >> i understand that. let me ask you two questions. why do they need all this time between these rescues? they're so successful so far and they must feel really energized. what's all this time in between? why are they doing four at a time? >> well, they're doing four at a time before and that's because they have only a certain number of divers. there's only a certain amount of space in the cave. and it's not just about the space. it's also about the amount of oxygen. some of the problems, these cavities where they can actually get out of the water and remove their masks, those are running out of oxygen. that's one of the reasons why we have these long pauses between each cycle. they're going in and they're replenishing the oxygen supply in the oxygen tubes that are hanging in these various parts of the cave. and they're also going through and tightening and refitting