this trip. no official update on the condition, but that s what we re pushing for, that information, to try and find out after this horrific ordeal they ve been through how they ve managed to keep their health up enough. clearly some of them have made it out and that s an arduous journey. if they re able to do that, you have to figure they re doing at least somewhat okay. hours and hours to get from the cave to the outside world and hopefully to where you are. they are obviously doing just that. matt rivers, thank you so much. i want to go now to the phone and dr. john kristoff is here with us. he is a sports medicine specialist who designed a training program to help those trapped chilean land miners back in 2010. thanks so much for joining me. talk about what you did then and how it might apply to what you re seeing, obviously, on the television as we speak.