As the first anniversary of Hurricane Katrina arrives, politicians from both parties are descending on still-ravaged New Orleans, painting two very different pictures of the city's path to reconstruction. Democrats travel there in the hopes of highlighting what they call the failures of the Bush administration to make good on promises to rebuild, while Republicans strike a more defensive posture, preferring to talk up the scant progress that has been made. To keep things in perspective, ThinkProgress has compiled a thorough timeline of the Katrina disaster, to remind you exactly who ignored which warnings, and when.

http://thinkprogress.org/katrina-timeline