Article Photos: Pa. zoo: Wild dogs killed boy who fell in exhibit 11/21

  Barbara Baker, CEO and president of the Pittsburgh Zoo and PPG Aquarium, pauses as she answers questions during a news conference on Monday, Nov. 5, 2012, in Pittsburgh. Zoo officials said a young boy was killed after he fell into the exhibit and the dogs mauled him on Sunday, Nov. 4, 2012. (AP Photo/Keith Srakocic)