Google and users have created overlays of NOLA that you can download into google earth so you can see what everything looked like before and after. You can find them here
http://earth.google.com/katrina.html
Just pick a kmz file and open it, and Google earth will take you to the area, and then you can adjust the transparency to see before and after
http://earth.google.com/katrina.html
Just pick a kmz file and open it, and Google earth will take you to the area, and then you can adjust the transparency to see before and after
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