EDITORS PLEASE NOTE: THIS SHOTLIST CONTAINS CONVERTED 4:3 MATERIAL Zookeepers in San Diego, California are witnessing a miracle. Bai Yun is 20-years-old and in labor, which makes her the second oldest panda to deliver a cub. Veterinarian Meg Sutherland-Smith was relieved that the risky birth was a success. (SOUNDBITE) Meg Sutherland-Smith, associate director of veterinary services, San Diego Zoo, saying (English): "I was so happy. I was very concerned that either the cub was going to be premature or that there were going to be issues and that we weren't going to have a viable cub. I've had sighs of relief, many many sighs of relief. We prepared. We were down here and had everything prepared if we had to intervene with a compromised cub, we had pretty much everything thing set up to try to deal with that. So it was great to know that we didn't have to use all that stuff." This is the sixth giant panda cub to be born at the San Diego Zoo, all from Bai Yun, making the animal park the largest breeding facility outside of China. Kilmeny Duchardt, Reuters.