Ueno zoo workers try to stop a running papier-mache rhino during a drill to prepare the park to deal with a situation in which an animal escapes from its enclosure, in Tokyo February 26, 2004. During the annual exercise, the rhino escapes from its cage and 'injures' visitors and zoo workers as it roams through the park and is finally shot with a tranquilizer gun and captured. REUTERS/Yuriko Nakao