Porkers on the Prowl.

Most of the United States' 6 million feral pigs live in the South--about half of them in Texas--but they're on the move, The New York Times reports. Their range expanded to 38 states from 17 in the last 30 years. That means ranchers and government officials as far north as Montana are keeping an eye on this smart, destructive invader. (Annual damage estimates...