Amid the hustle and bustle of downtown Los Angeles, there exists another world, an underground world of illicit trade in-not drugs or sex-but bacon-wrapped hot dogs. Street vendors may sell you an illegal bacon dog, but hardly anyone will talk about it, for fear of being hassled, shut down or worse. Our camera caught it on tape. One minute bacon dogs are sold in plain view, the next minute cops have confiscated carts, and ordered the dogs dumped into the trash. Elizabeth Palacios is one of the few vendors willing to speak publicly. "Doing bacon is illegal," she explains. Problem...