About a year ago, a John Hopkins University study in the British medical journal The Lancet estimated the number of civilian casualties in Iraq. It came up with a number—100,000 dead—that was higher than any other estimate, and was mostly ignored.

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.

Alex Blumberg tells the story of an audacious act of rebranding done by a group of people who aren't normally thought of as very audacious: public librarians. In Michigan, they've started staging rock concerts in libraries.

This American Life producer Alex Blumberg investigates a little-studied phenomenon: Children who get a mistaken idea in their heads about how something works or what something means, and then don't figure out until well into adulthood that they were wrong. Includes the tale of a girl who received a tissue box for Christmas, allegedly painted by trained monkeys.