This 2009 handout photo released by a friend of Xiyue Wang, shows Xiyue Wang at his apartment in Hong Kong, China. Princeton University professor Stephen Kotkin, who advised Wang, a Chinese-American researcher sentenced to prison in Iran, defended his former student as innocent of all charges against him. Kotkin told The Associated Press by email that Xiyue Wang is a "remarkable, linguistically gifted graduate student" who studied governance in 19th and early 20th century Muslim regions. (Friend of Xiyue Wang via AP)
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