Know your Pit Bull

This is the famous beast itself, the American Pit Bull terrier. Lovely looking dog eh?

However, American Staffies & others are commonly regarded as Pit Bull terriers too.

This is a Bull terrier & is, I think, what most people believe is a Pit Bull. They are not related. Ugly beast though.

Pit bull - Wikipedia, the free encyclopedia

Unsurprisingly, there is dispute about this Wikipedia entry, mostly about how vicious or otherwise these dogs are.