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Zookeepers chase fake gorilla during emergency drill

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Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill. Kazuhiro Nogikazu/AFP/Getty Images
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Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
A zookeeper (top C) aims a tranquilizer gun towards an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an… Kazuhiro Nogikazu/AFP/Getty Images
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Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
Zookeepers check a an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo… Kazuhiro Nogikazu/AFP/Getty Images
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Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
Zookeepers carry an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in… Kazuhiro Nogikazu/AFP/Getty Images
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Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
Employees at Ueno Zoo uses nets to capture a mock gorilla during an emergency drill in Tokyo, Thursday, Feb. 6, 2014. Ueno Zoo conducted the drill in scenario when a… Kazuhiro Nogikazu/AFP/Getty Images
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Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
Zookeepers hold a net to capture an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at… Kazuhiro Nogikazu/AFP/Getty Images
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Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
Zookeepers hold a net to capture an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at… Kazuhiro Nogikazu/AFP/Getty Images