'It's about guns, but it's not just about guns'
01:34Preview: Mayor Mitch Landrieu and New Orleanians explain how the cycle of gun violence begins and self-perpetuates. Watch "50 Years of Guns" on MSNBC Friday, Nov. 22, 9 p.m. ET
Preview: Mayor Mitch Landrieu and New Orleanians explain how the cycle of gun violence begins and self-perpetuates. Watch "50 Years of Guns" on MSNBC Friday, Nov. 22, 9 p.m. ET