Cardiologist Dr. Bill Warren, left, and echocardiographer Eric Smith, both from Memorial Hospital, perform an echocardiogram Wednesday, May 7, 2014 on Goliath, one of the chimpanzees at the ... more 
Cardiologist Dr. Bill Warren, left, and echocardiographer Eric Smith, both from Memorial Hospital, perform an echocardiogram Wednesday, May 7, 2014 on Goliath, one of the chimpanzees at the Chattanooga Zoo at Warner Park. (AP Photo/Chattanooga Times Free Press, John Rawlston) less 
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Associated Press | Photo By Chattanooga Times Free Press, John Rawlston
Wed, May 7, 2014 10:09 PM EDT