90 miles from new orleans, the mississippi river, lies the louisiana state penitentiary. commonly referred to as angola, at 18,000 acres, it's 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 the current population of 5,148 men served sentences so long it's estimated that 90% of them will die here. but things have changed drastically over the past decade and much credit goes to the warden. >> correction is our name. if we can save one person from