I was at the zoo today, and it appears that in response to the gorilla escape they have put up temporary hot-wires around all of the viewing areas. I also believe that the gorillas were shut in today. One side not to be made, the wall that the gorilla was on was the one that leads to the enclosed area between the main building and the wild dog enclosure. There was a similar
event many years ago involving a female orangutan, and like the gorilla, ran back into her enclosure when she saw her keepers.