I. Kid. You. Not. From Workbench:
In an interview with UPI, Gretna Police Chief Arthur Lawson confirmed that his department shut down the bridge to pedestrians: "If we had opened the bridge, our city would have looked like New Orleans does now: looted, burned and pillaged."
The Gretna police were blocking one of the only ways to get out of New Orleans on foot.
The paramedics believe that race played a factor in the decision to block evacuees on foot. Gretna’s population is 56 percent white and 36 percent black, according to the 2000 U.S. Census.
Ya think? H/t Instapundit, again.