Nogales, Arizona.USA.October 20, 2006..The USA border fence and border patrol vehicle, protected by a second fence from Mexicans on the other side throwing rock at it. The port of entry into the USA, Nogales is near by. The city is divided between Nogales Mexico and Nogales USA. The fence extends for several miles in either direction off the port of entry - then there is little to stop people from crossing illegally. Nogales is flooded with Mexicans legal and illegal and is mostly a transit and shopping town.