In his first television appearance, Officer Frank Chiafari speaks out about the horror he witnessed during the February 2009 chimpanzee attack that left its victim mangled and disfigured. When he came face to face with the enraged primate, he had no choice but to shoot. The events of that day haunted him; Chiafari struggled with post-traumatic stress disorder, an anxiety disorder marked by intrusive thoughts and periods of sadness, anger or depression that people can develop after experiencing a life-threatening experience. Chiafari shares his story and extends a message of hope to those suffering with PTSD. Dr. Oz delves into the mind-body responses that are characteristic of PTSD.

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From Cerebral Palsy to Olympian: How This Athlete Beat the Odds

Nick Mayhugh, a world-class athlete in USANA's "Winner's Circle," is showing you how he fuels his body and ambition.


Nick Mayhugh grew up playing soccer like most American kids do. But unlike most kids, he had the elite skills to match his deep passion. He perfected his play, practiced into the nights and dedicated his young life to the sport. For him, that meant secretly compensating for physical effects he was told were normal growing pains but that he knew weren't, like numbness on the left side of his body. So he pushed harder than the others, learning to play with just his right limbs and teaching himself to walk without a limp.

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