. ♪ >> 90 miles from new orleans, up the mississippi river, lies louisiana state penitentiary.ommonly referred to as angola, at 18,000 acres, it is the largest prison in america. started as a slave plantation in the 1700s, converted to a prison plantation at the end of the civil war, and taken over by the state in 1901, this storied land has seen more than its share of pain. it was once considered the bloodiest prison in america. and its current population of 5,148 men serve sentences so long, it's estimated that 90% of them will die here, yet things have changed drastically over the past decade, and much credit goes to warden burl cain. >> that's really what our mission is, it's not to torment and torture, but it's to correct bad behavior and do that any way you can. and the root way to do that is morality. moral people obviously don't rape, pilfer and steal. >> right here in the midst of angola, i have seen change because of the seed of favor of god. >> warden cain's approach to morality works on two levels. one, spiritual and religious. the other engaging employment opportun