okay, so i checked it out on miami-dade county animal control website:
5-17 Pit Bull Law
It is illegal in Miami-Dade County to own any dog which substantially conforms to a pit bull breed dog, unless it was specially registered with Miami-Dade County prior to 1989. Acquisition or keeping of a pit bull dog: $500.00 fine and County Court action to force the removal of the animal from Miami-Dade County. ONLY an Animal Services Investigator trained in pit bull identification will determine if the dog conforms to pit bull breed standards. from:
http://www.miamidade.gov/animals/regulations.asp
so i guess that country does ban pit bulls. now that is really sad, to single out a breed for banning. if only previous owner would have been more responsible, the dogs wouldn't have to bear the punishment that way.