why are children working here? kids are working here for food. they need food. if they can't fill their stomachs, they need to work, he says. as he's pulled away, perhaps he has said too much. i'm not going to pay you money. why would i pay you money? though he won't pay the workers a wage, he has no problem asking us to pay him for the interview. we, of course, refuse and everyone goes back to making bricks. some will stay trapped in debt. >> they remain in slavery forever. >> reporter: she works for an international organization called free the slaves. she admits her organization's mission is ambitious. >> what's the most shocking thing that's happening here in this country? >> there are 37 million people around the world in slavery.