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Iran’s Supreme Leader Ayatollah Ali Khamenei attends a meeting with Iranian nuclear scientists and managers in Tehran February 22, 2012 (Credit: Reuters/Khamenei.ir/Handout)

Iran's Supreme Leader Ayatollah Ali Khamenei attends a meeting with Iranian nuclear scientists and managers in Tehran February 22, 2012 (Credit: Reuters/Khamenei.ir/Handout)