In this photo provided by the San Francisco Zoo, a 6-week-old, 12 pound baby Sumatran tiger is watched by her 5-year-old mother Leanne, in the outdoor exhibit at the San Francisco Zoo, Monday, April 14, 2008 in San Francisco. His mom delivered triplet male cubs on March 7. She debuted them today, one at a time, in the outdoor public exhibit. [Agencies]