From the Brit Hume program, we have
this.
Basically it says that water and food attempted to be provided by FEMA (or agencies working under FEMA) were denied by something called the Louisiana Dept. of Homeland Security, which is a state office. The reporter claims that LDHS did not want the SuperDome to become a magnet for more people. While this sounds fishy to me, I can't explain why, and after hearing all those stories about people being refused entrance, it kind of makes sense. If you can disprove, you get a brownie point. If you prove (after all, it did come from Fox and Hume's show, so if you can find further evidence), then Blanco should be fired.