A little boy was mauled to death today after falling into the African painted dog exhibit at the Pittsburgh Zoo & Aquarium. "The screams just kept coming and coming: 'Someone help. Someone has to do something,'" recounted Angela Cinti, 20, of Bethel Park, who was visiting the zoo today. Zoo President and Chief Executive Officer Barbara Baker said the child, who was about 3 years old, was on an outing with his mother when he fell over a wooden railing and off of a mesh barrier where the painted dogs were on display. A zoo spokeswoman said the wooden railing...