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Iraqi Christians light candles inside a shrine in the grounds of Mazar Mar Eillia (Mar Elia) Catholic Church on December 12, 2014 in Erbil, Iraq. (Matt Cardy/Getty Images)

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Cuban President Fidel Castro (L) and his brother Raul, Minister of the Revoutionary Armed Forces, in Havana, during a meeting of the Cuban Parliament, December 23, 2003. (ADALBERTO ROQUE/AFP/Getty Images)

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U.S. Attorney General Eric Holder speaks at the Justice Department in Washington, DC, December 3, 2014. (Mark Wilson/Getty Images)

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Canada's Prime Minister Stephen Harper at Ottawa International Airport on March 18, 2014 in Ottawa, Ontario. (Cole Burston/AFP/Getty Images)

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Workers remove a poster-banner for 'The Interview' from a billboard in Hollywood, California, December 18, 2014 a day after Sony announced was cancelling the movie's Christmas release due to a terrorist threat. (ROBYN BECK/AFP/Getty Images)

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(Joe Raedle/Getty Images)

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(Jeff J Mitchell/Getty Images)

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Workers remove a poster-banner for 'The Interview' from a billboard in Hollywood, California, December 18, 2014 a day after Sony announced was cancelling the movie's Christmas release due to a terrorist threat. (Michael THURSTON/AFP/Getty Images)