north koreans kill them all, kill them all the americans and then how many lived like that? reporter: in school he says stones were used to simulate hand grenades. they bract practice or throw far or how little. that s for gym class. there are targets. targets for american soldiers. reporter: north korean soldiers are, in fact, brain washed from the time they re first cognizant, as well as for factories, government agencies, farms. analyst gordon flake visited a place called the children s farm in 1996. they brought all the kids out to greet us and they came utowith that well rehearsed, glassy eye stare. but, again, in a remarkable way that there is a degree of indoctrination. reporter: getting a red scarf means you re in the pioneer.