Black Wall Street: Three entrepreneurs share their stories

Almost a century ago, Tulsa, Oklahoma, faced one of the deadliest episodes of racial violence in America's history. Dubbed "Black Wall Street," the booming black-owned business district was almost completely burned to the ground. Hundreds were killed after white mobs looted and set fire to buildings. CNBC's Andrea Day has the story of a new generation of Black Wall Street entrepreneurs and the challenges they face today.