I've known this story for a few years now but just watched it in its entirety on "Animal Planet" and it still touches a soft spot in my heart. This is just a short video, but there is plenty about this amazing story on youtube or if you google Christain the lion.
http://www.youtube.com/watch?v=oiGKWoJi5qM
http://www.youtube.com/watch?v=oiGKWoJi5qM