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Photo by: Mehdi Ghasemi

Beside a poster of Iranian supreme leader Ayatollah Ali Khamenei, mourners carry a flag draped coffin of Mostafa Ahmadi Roshan, a chemistry expert and a director of the Natanz uranium enrichment facility in central Iran, in his funeral ceremony, on Friday, Jan. 13, 2012, in Tehran, Iran. (AP Photo/Iranian Students News Agency, Mehdi Ghasemi)

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