There is a must see post on Castle Argghhh!
Battle For Koln
Here is some partial video below, but go to the link above for the good stuff.
A German researcher has put together the footage of the famous tank battle into a coherent blow-by-blow story. If you've ever seen a WWII documentary on the battle for Germany you'll recognize it. After the video, I went to the researcher's site where he has posted still shots, information on the photographers, the names and fates of the tank crews, even a walking tour in modern Cologne where many of the buildings still stand.
"Read the whole thing."
I agree with the Donovan, I've been to Koln several times, the next time I go, it will feel different.