Saturday will be the third anniversary of Hurricane Katrina's initial formation over the Bahamas. When she washed over Mississippi and Louisiana six days later, on Aug. 29, 2005, she breached critical levees that were supposed to protect New Orleans. Hundreds drowned.I recently interviewed John Berry -- author of Rising Tide: The Great Mississippi Flood of 1927 and How It Changed America and The Great Influenza: The Story of the Deadliest Pandemic in History -- a New Orleans resident who now serves on the Levee Board. We discussed the current situation in New Orleans three years on and the reasons the rest of the country bears some responsibility for New Orleans becoming so vulnerable to storms. Full-size video at TPMtv.com.