The Senate committee overseeing homeland security has been attempting to investigate the response to hurricane Katrina, but it is running into a wall of obstruction from officials in Louisiana. On October 7th the Senate panel requested that Governor Blanco provide them with assorted documentation covering what disaster plans she had in place in the event of something like Katrina occurred, and what steps were put in place following the "Hurricane Pam" simulated disaster scenario.
On October 25th, Governor Blanco's office asked for an additional ninety days to respond to the request, citing their involvement in recovering from hurricanes Katrina and Rita. So perhaps by early next year, barring any records getting lost or destroyed, or computer hard drives unfortunately crashing, we may finally get some answers as to what decisions Blanco and Mayor Nagin made both before and in the immediate aftermath of Katrina making landfall.
If not, the Republicans can always shut down the Senate in protest.