Two chimps walk together at Chimp Haven in Keithville, La., Tuesday, Feb. 

Two chimps walk together at Chimp Haven in Keithville, La., Tuesday, Feb. 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)
Associated Press
Two chimps walk together at Chimp Haven in Keithville, La., Tuesday, Feb. 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)
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