TOKYO, JAPAN - FEBRUARY 02:  Zookeepers hold up a large net barricade to capture a zoo staff member dressed as a zebra at Ueno Zoo on February 2, 2016 in Tokyo, Japan. In the drill simulating the scenario that a zebra escaped in case of disaster, the Ueno Zoo workers, local police and emergency workers practiced evacuating the guests and capturing the zookeepers dressed in zebra costume.  (Photo by Christopher Jue/Getty Images)