now. >> this bathtub that we're in today was a fast-flowing river. >> hard to believe now. but lynch and his men braved 27 different rapids, lost one of his two boats, and described the banks of the jordan as lush jungles with countless weeping willows shading their journey. >> and how many are there now? >> the willow tree is extinct. >> but when you were young, you don't know what you never had. and for these kids, this is heaven enough. >> look at this right here, this is amazing. >> this is what a river should do, it should provide recreation and entertainment. >> if i was a kid growing up here, this is where i'd be all day long. but jordanian and palestinian kids will never experience this. >> well, we're determined that they will. >> but first, he has to convince the israeli government to tear down this dam. >> just a few kilometers south, this becomes the border.