MADISON, Wis. (AP) – Gov. Scott Walker has signed into law a bill benefiting the military-style amphibious vehicle known as the Wisconsin Duck.  The measure Walker signed Friday would allow the vehicles popular with tourists in Wisconsin Dells to travel up to five miles on land instead of just two before they would have to be registered as a vehicle and not a boat.  The vehicles have wheels and can operate on land but are shaped more like a boat and also float on water. They can carry up to 10 passengers and have been popular with sightseeing tourists for years.  Walker says he is pleased to sign a bill that modernizes the law for a part of the state’s tourism industry.