there would be a second group that were less probust. we will start seeing some of them, too, aren't we? >> reporter: we are. the significance of the first couple of rides up, particularly the first. they didn't know exactly -- they thought it would go well. let's make no mistake about that. they did a test run and it went well. they were not sure what would happen. if it would bounce against the mine, if it would spin around, if it would make people discombobulated. that's why they wanted the healthy people to ride first. then they will start bringing up the people who need to get up quick and those include two men, one who has diabetes and one who has typer tension. the weaker of them. nobody there is weak. they survived 68 days. and then they will bring up the rest of them. the last one will be coming up is the captain of the ship.