After the incident of San Fransisco Zoo's Tatiana, and her subsequent demise, I found an interesting news posting on other zoo mishaps. Even Little Joe in my beloved Franklin Park Zoo has had his moments.
Unfortunately, as everything else, zoos are woefully underfunded. These animals are not meant to socialize with people. Things happen.
Part of the price of taking away habitats and wanting to admire this sort of beauty, is that unfortunately there is a risk. Luckily, there have not been more fatalities than this.