The San Francisco Zoo announced today that Leanne, the 230-pound Sumatran tiger, is now caring for three newborn cubs. The SF Zoo, which came under scrutiny after last year's tiger-related mauling death of 17-year-old Carlos Sousa Jr., says that this is the first birth of Sumatran tiger for the zoo since 1956. It turns out Leanne had three of the cubs over a week ago, but kept them accidentally hidden from view of zoo......