chased to the gilo river where the waters did not part. for joseph taban, that day will never go away. >> taban: we saw so many people who were just floating on the river. >> simonies. >> taban: dead bodies, yeah, who are floating on the river. >> simon: many were shot, many drowned, many were eaten by crocodiles. zachariah magok was there. >> zachariah magok: 1,000 to 2,000 who died in that river. >> simon: 1,000 or 2,000 died in that river? >> magok: yes. >> simon: it wasn't much better on the other side. they walked across deserts, over mountains. they had no food or water. paul deng was seven when he started the walk. >> paul deng: you have to urinate so that you drink your own urine. >> simon: did you ever do it yourself? >> deng: yeah. i didn't want to die. other people didn't want to die. >> simon: in the spring of 1992, after walking more than a thousand miles, the boys made it over the border into kenya, to a desolate place called kakuma. for the u.n., it was an emergency of vast proportions, these emaciated children. for the boys, it was the safest they'd been in five years. joseph became a medical assistant at the camp clinic. ( singing ) abraham foun