Barbara Baker, CEO and president of the Pittsburgh Zoo and PPG Aquarium, 

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)
Associated Press
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)
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