with open arms. we don t care what country you are from, if you have something to help us please bring it. reporter: rescuers were aided by a canadian oil drill, top drillers from the u.s. nasa, a cable from germany, so the capsule won t spin, help from argentina, south africa. there is no exact parallel to the predicament the men are in. the closest may be the long isolation of astronauts. chile invites four nasa doctors. they consult on psychology and nutrition. they say chile has broken frontiers here. there will not only be a case study in medicine, mining and businesses as well. they were innovative how they got supplies and logistics down to the miners. at the same time they had to devise a plan to get the men out. sure a rescue capsule was used in the rescue in pennsylvania 2002, but that was 230 feet down. this was ten times deeper. it was in part the failure of government oversight that caused this mining disaster but it was the swift and efficient response of the chil