In this Tuesday, June 7, 2016 photo, Pvt. Mustafa Muhammed Saadoun, 21, of Iraq’s elite counterterrorism forces shows a wolf’s tooth he wears as a good luck charm, after coming back from a mission during the operation to oust the Islamic State group from Fallujah, Iraq. He says the necklace makes him stronger and makes him less fearful. (AP Photo/Maya Alleruzzo)

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