SAN FRANCISCO, Dec. 28 (UPI) -- The wall around the tiger exhibit at the San Francisco Zoo, where a man was killed by an escaped tiger, was 4 feet lower than national standards.
The Association of Zoos and Aquariums, which inspected the tiger exhibit three years ago, didn't raise questions about the height or safety of the wall, The San Francisco Chronicle reported. The recommendation that tigers be secured with walls at least 16 1/2 feet high is advisory and a spokesman said that the only mandatory standard is that walls be big and strong enough to keep tigers in.