Iraqi Christians attend a Christmas Eve mass at St. Joseph’s Chaldean Church in central Baghdad, Iraq, Monday, Dec. 24, 2012. Iraqi Christians gathered for Christmas Eve services amid tight security. The exact number of Christians remaining in Iraq is not known, but it has fallen sharply from as many as 1.4 million before the U.S.-led invasion nearly a decade ago. Community leaders believe there are about 400,000 to 600,000 Christians left in the country, according to figures from the U.S. State Department. (AP Photo/ Hadi Mizban)

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