SAN FRANCISCO -- The wall of a moat that surrounds the San Francisco Zoo's tiger enclosure is far shorter than officials thought and also below national standards, authorities said Thursday. Zoo ...

Big-cat experts say a fully grown tiger could very likely climb the 12 1/2-foot moat wall at the San Francisco Zoo, especially if there were little or no water in the moat.

The director of the zoo where a teenager was killed by an escaped tiger acknowledged Thursday that the wall around the animal's pen was just 12½ feet high - well below the height recommended by ...