In this photo taken April 14, 2014, Jen Rucker, zoo keeper, left, and Kevin Morris, assistant curator, tighten their grip as they keep Lissa in place with Ashleigh Kandrac, curator, after the 3,500 ... more 
In this photo taken April 14, 2014, Jen Rucker, zoo keeper, left, and Kevin Morris, assistant curator, tighten their grip as they keep Lissa in place with Ashleigh Kandrac, curator, after the 3,500 pound white rhino was injected with narcotics to keep asleep during surgery at Lion Country Safari, in Loxahatchee, Fla. A team of doctors has been removing parts of her horn to remove the cancerous tumor and inject chemotherapy drugs. (AP Photo/The Palm Beach Post, Greg Lovett) MAGAZINES OUT. TV OUT. NO SALES. less 
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Associated Press | Photo By The Palm Beach Post, Greg Lovett
Mon, Apr 28, 2014 9:54 PM EDT