Dentist performs root canal on tiger

In this photo provided by the Alaska Zoo, Kunali, a 300-pound, 7-year-old Siberian tiger, undergoes root canal surgery at the Alaska Zoo in Anchorage, Alaska. Thursday, Oct. 20, 2011. This was the first procedure in a recently opened operating room and the first for the zoo's new veterinary table, complete with hydraulic lift and fold-out leafs to accommodate limbs and tails.