I first saw this poster in a co-worker's cube, he couldn't tell me where be bought it from as he simply found it in one of our computer labs collecting dust and decided to put it up in his cube after September 11. So after searching the internet, I found it!:

http://www.barewalls.com/product/artwork.e...ArtworkID=94381

I thought I'd share for those who may be interested, the poster looks a lot better in real life than on the website.

More are found here:

http://www.barewalls.com/cgi-bin/search.ex...&orderby=artist