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TAL AFAR, IRAQ: U.S. troops from 2nd Squad, 14th Cavalry carry their Christmas meal into a Black Hawk helicopter, in Tal Afar, northwest of Iraq, 25 December 2004, to enjoy Christmas lunch in the Sinjar Mountain, in the Kurdish area of northern Iraq, close to the Syrian border. AFP PHOTO/MAURICIO LIMA (Photo credit should read MAURICIO LIMA/AFP via Getty Images)

TAL AFAR, IRAQ:  U.S. troops from 2nd Squad, 14th Cavalry carry their Christmas meal into a Black Hawk helicopter, in Tal Afar, northwest of Iraq, 25 December 2004, to enjoy Christmas lunch in the Sinjar Mountain, in the Kurdish area of northern Iraq, close to the Syrian border.  AFP PHOTO/MAURICIO LIMA  (Photo credit should read MAURICIO LIMA/AFP via Getty Images)