In this Nov. 29, 2012 photo, Nairobi, a 9-year-old female cheetah, keeps an eye on activity in an adjacent enclosure at the cheetah breeding facility at Safari Park in Escondido, Calif. Cheetahs might be the fastest mammals in the world, but they are also the world's biggest scaredy-cats. The tightly wound, timid, flight-minded, anti-social creatures don't breed easily and are in danger of going extinct in the wild and in captivity. (AP Photo/Lenny Ignelzi)

Associated Press
In this Nov. 29, 2012 photo, Nairobi, a 9-year-old female cheetah, keeps an eye on activity in an adjacent enclosure at the cheetah breeding facility at Safari Park in Escondido, Calif.  Cheetahs might be the fastest mammals in the world, but they are also the world's biggest scaredy-cats. The tightly wound, timid, flight-minded, anti-social creatures don't breed easily and are in danger of going extinct in the wild and in captivity. (AP Photo/Lenny Ignelzi)
In this Nov. 29, 2012 photo, Nairobi, a 9-year-old female cheetah, keeps an eye on activity in an adjacent enclosure at the cheetah breeding facility at Safari Park in Escondido, Calif. Cheetahs might be the fastest mammals in the world, but they are also the world's biggest scaredy-cats. The tightly wound, timid, flight-minded, anti-social creatures don't breed easily and are in danger of going extinct in the wild and in captivity. (AP Photo/Lenny Ignelzi)
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