through a medical evaluation. >> i haven't actually heard the helicopter. >> i haven't heard the helicopter either. just an image of downtown santiago. >> maybe florencio -- yeah. >> looks like they're beginning the loading of the second rescue. >> there we go. starting to turn. >> the winch in motion. >> prior to coming here, i had no idea what a winch was. but now i can tell you everything about it. i think a lot of people have learned a lot about the logistics and the equipment going into this process. >> engineering is not something you talk about much until there's a disaster. >> and when it comes. >> this is an apollo 13 moment. >> and mario sepulveda will