It's the busiest execution chamber in the country. In the small town of Huntsville, Texas 18 inmates were executed in 2008 alone, 423 between 1982 and 2008. National Geographic provides rare access inside this center of the capital punishment controversy. In intimate interviews, meet those scheduled to be executed in just weeks and learn how they struggle through each day knowing the exact date and hour of their death. And find out how the residents of Huntsville feel about living in a town that's ground zero for capital punishment in the United States.