This undated publicity image released by Discovery Channel shows a great white 

This undated publicity image released by Discovery Channel shows a great white shark off the coast of New Zealand. Shark Week begins Sunday, Aug. 4 at 9 p.m. EST on Discovery. (AP Photo/Discovery Channel, Jeff Kurr)
Associated Press
This undated publicity image released by Discovery Channel shows a great white shark off the coast of New Zealand. Shark Week begins Sunday, Aug. 4 at 9 p.m. EST on Discovery. (AP Photo/Discovery Channel, Jeff Kurr)
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