Mysterious Fly Invasion in Pennsylvania

One Lancaster County neighborhood has flies -- swarms of them. "There's always flies, always, not one -- a lot," said homeowner Tracey Little. "It's horrible, absolutely horrible. You can't go out on your deck. You go out to sit in the sun and you're covered with flies," Little said. "If I'm cooking in here and have the door open, that door will literally be covered in flies because of the smell of the food." Some neighbors said they think that a nearby chicken farm could be causing the fly infestation.