Please read this first hand account of the way people sealed off the exits from NOLA and forced people to remain. Its a long post, here is a snippet. Someone should get these people on Olbermann or Aaron Browns show.
http://www.dailykos.com/storyonly/2005/9/6/132725/8931 Hurricane Katrina-Our Experiences
Larry Bradshaw, Lorrie Beth Slonsky
(snippet)
We walked to the police command center at Harrah's on Canal Street and were told the same thing, that we were on our own, and no they did not have water to give us. We now numbered several hundred. We held a mass meeting to decide a course of action. We agreed to camp outside the police command post. We would be plainly visible to the media and would constitute a highly visible embarrassment to the City officials. The police told us that we could not stay. Regardless, we began to settle in and set up camp. In short order, the police commander came across the street to address our group. He told us he had a solution: we should walk to the Pontchartrain Expressway and cross the greater New Orleans Bridge where the police had buses lined up to take us out of the City. The crowed cheered and began to move. We called everyone back and explained to the commander that there had been lots of misinformation and wrong information and was he sure that there were buses waiting for us. The commander turned to the crowd and stated emphatically, "I swear to you that the buses are there."
We organized ourselves and the 200 of us set off for the bridge with great excitement and hope. As we marched pasted the convention center, many locals saw our determined and optimistic group and asked where we were headed. We told them about the great news. Families immediately grabbed their few belongings and quickly our numbers doubled and then doubled again. Babies in strollers now joined us, people using crutches, elderly clasping walkers and others people in wheelchairs. We marched the 2-3 miles to the freeway and up the steep incline to the Bridge. It now began to pour down rain, but it did not dampen our enthusiasm.
As we approached the bridge, armed Gretna sheriffs formed a line across the foot of the bridge. Before we were close enough to speak, they began
firing their weapons over our heads. This sent the crowd fleeing in various directions. As the crowd scattered and dissipated, a few of us inched forward and managed to engage some of the sheriffs in conversation. We told them of our conversation with the police commander and of the commander's assurances. The sheriffs informed us there were no buses waiting. The commander had lied to us to get us to move.
We questioned why we couldn't cross the bridge anyway, especially as there was little traffic on the 6-lane highway. They responded that the West Bank was not going to become New Orleans and there would be no Superdomes in their City. These were code words for if you are poor and black, you are not crossing the Mississippi River and you were not getting out of New Orleans