Music question

Ken Burns documentaries always contain pieces of music that really move me, and which are always difficult to track down, just wondering if anyone knows the name of the piece used when Sam Beck's son is explaining that his father's tough life made him determined to not be farm and not be poor

“God, what do I have to do to have money and not be a farmer? I don’t care whether it is being a pimp, I don’t care whether it is stealing – whatever it takes so that I’m not going to farm and I’m not going to be broke.”

any help appreciated :)