Civil War's Second Bloodiest Battle Remembered

September 20th, 2013 marked the sesquicentennial of the American Civil War's second bloodiest battle, in Chickamauga, Georgia. Here, the Confederate Army baited the Union into a fight in hopes of recovering Chattanooga for the South. Just last month, 6,400 men, women and horses met on that battlefield to fight it out all over again - this time using blanks. National Geographic Weekend producer Justin O'Neill attended the reenactment to learn about our need to relive these painful memories.