we think about, the racial strife -- >> you forget all that -- >> i want to liv, you want to live. i don't care if you're black or you're white. >> you could do what you wanted to. when you go under that ground, you hey, you got to be together and watch out for each other because that's the only way can you get in there and get out. big u.s. steel, they had the biggest mine in the nation. >> what years was that? >> '20s and '30s and '40s. it was a place to make a living but it was no money. it was scrip. >> which is corporate currency only used at coal camp. it was deemed illegal. like if the boss paid you in arcade tokens and you lived in the arcade. >> you had to spend it at the store. you couldn't take your money out of this area. >> really? >> it wasn't slavery -- >> but it wasn't much better. >> they'll pay you but you use the money on the plantation. >> you only use the money right here. >> this used to be a school.