Kiri, a Malayan tiger, paces in a pen at the Fresno Chaffee Zoo in Fresno, California on February 23, 2010. The zoo is making efforts to breed endangered tigers and orangutans. (Eric Paul Zamora/Fresno Bee/MCT)

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Kiri, a Malayan tiger, paces in a pen at the Fresno Chaffee Zoo in Fresno, California on February 23, 2010. The zoo is making efforts to breed endangered tigers and orangutans. (Eric Paul Zamora/Fresno Bee/MCT)

Read more