Re the photos of Katrina. I've removed them for a couple of reasons. The main one being copyright (that remains with the original photographer). The second is that they are not actually from Katrina, but formed part of a hoax email using photos from storm chaser and photographer Mike Hollingshead, to whom the photos have been attributed. He has confirmed taking them (most can be found via
http://extremeinstability.com/2004.htm ). They actually document various cupercells, tornados, and other meteorological phenomena Hollingshead observed in 2004.