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Associated Press
In this undated image provided by HBO, Nick Nolte appears in a scene from the HBO original series "Luck." The sport of horse racing is determined to endure the inevitable deaths of its injury-prone animals. But Hollywood has proved it lacks the stomach for it. The HBO TV channel ended the racing series "Luck" after three horses used in the realistic production were injured and euthanized over a period stretching from 2010 to last week. (AP Photo/HBO, Gusmano Cesaretti)

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