it was a day that could have ended in tragedy. one tuesday last august, a man carrying an ak-47 walked into a georgia elementary school with more than 800 children in the building. but in the front office he ran into antoinette tuff, a bookkeeper at the school. antoinette convinced him to surrender to the police. here is part of her 911 call that inspired the whole country. >> i can let them know that you have not tried to harm me or do anything with me or anything, if you want to. but that doesn't make any difference. you didn't hit anybody. >> you don't know that. >> let me ask you this, ma'am. he didn't hit anybody. he just shot outside the door. if i walk out there with him? if i walk out there with him so they won't shoot him or anything like that, he wants to give himself up.