The Baddest Breeds

Illegal immigration is a perennial political hot-button issue, but with all the talk of marauding hordes from overseas or south of the border, it's easy to overlook an entirely different kind of "invasion," one that knows no political border and won't actually lower crime rates: animal species. This isn't your standard biblical plague of locusts; many of the monstrous beasts taking over habitats across the United States are, well, downright cute. Here are our picks for the baddest breeds currently on the rampage across the land (and water).