Even after the escape of the Siberian tiger and mauling of a teenager in 2007, the San Francisco Zoo may still not be safe according to this news report. With faulty alarm systems, the zoo is investing $170000 for a new one, money wasted on problems that should have been fixed long ago.
San Francisco Zoo workers raise safety concerns over "code red" alarms | abc7news.com
San Francisco Zoo workers raise safety concerns over "code red" alarms | abc7news.com