If the events of 9/11/2001 brought this country together, it is clear that the aftermath of Hurricane Katrina has brought about further division. While all government parties must take some share of the blame, it is clear that the federal government was far too lax in its response effort.
Unlike 9/11, this storm had been predicted and should not have taken anyone by surprise. FEMA needs to be overhauled and the current leaders suspended. An independent (non-partisan) investigation of the Katrina Aftermath is absolutely necessary.
Lastly, while we can't control hurricane formation directly (although man's tinkering with environmental factors such as global warming may have played a part), we can control pre-storm evacuation and post-storm relief efforts. Let's hope that when the inevitable predicted hurricane strikes Manhattan in the future, we don't have a repeat of the Katrina fiasco on a much grander scale.