to the camera so far below, then rode up to a tumultuous celebration. then a talk with the president about the lessons of the disaster, the rescue, and the hope for the future. i hope we have learned from this, and that chilean mining will be different, he said. i hope things will be done correctly, that things will be done right. this is what i want. >> chi-le! chi-chi-chi-! le-le-le! >> just amazing moments. up next, how they did it. how the 33 miners survived. while trapped for more than two months under a half mile of rock and 17 days before they even knew whether or not anyone knew they were alive. we're going to take a close look at what it takes mentally to endure, with adventurer bear grylls.