Here is another one. Warning, the section about dog fighting has some very graphic photos. There is an interesting section about other activities more suitable for pit bulls, such as Schutzhund, agility, search and rescue, and tracking. Same activities available to dogs of other breeds. Nature versus nurture, I don't know for sure; but one thing I have learned from being on Pet Talk is that if I'm ever to be a dog parent, the way to learn proper behavior for both me and the dog is training. Both I and the dog will have to be taught the right way of doing things, otherwise I don't think it would be reasonable to expect only proper behavior. Training and patience.

http://www.workingpitbull.com/activities.htm