Other zoo animals have attacked, escaped in recent years

• Story Highlights
• In February, a jaguar at Denver Zoo fatally mauled a zookeeper
  
• A year ago, clouded leopard escaped at National Zoo; later found napping
  
• In 2004, 600-pound tiger escaped from Florida property of former Tarzan actor
  
• Illusionist Roy Horn mauled by tiger during his act in Las Vegas in 2003
  
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