Killer whale attack raises question of captive animals

March 1, 2010 6:58:55 AM PST
Rocky, a 700-pound grizzly considered one of the most gentle animals of all Hollywood's performing beasts, bites down on the neck of a veteran trainer. Illusionist Roy Horn is severely mauled by a show tiger during a Las Vegas performance. An elephant at an Indonesian tourist resort tramples its longtime handler to death.