To find out more about the bridge Denise talked about in act one and the armed police who prevented pedestrians from crossing, This American Life producer Alex Blumberg talks with Lorrie Beth Slonsky and her husband Larry Bradshaw. They're paramedics from San Francisco who were visiting New Orleans for a convention when Hurricane Katrina hit. After the storm, they tried to escape the city in a number of ways. When they tried to leave the city on foot, they were told, at gunpoint, by police, that they must turn back. We also hear from Debbie Zelinsky, who was with them. (17 minutes)