Xiyue Wang, a Princeton Ph.D. student and US citizen, was arrested in Iran on August 8, 2016, while researching Persian history for his doctoral thesis, July 18, 2017.  © 2017 Reuters

Xiyue Wang, a Princeton Ph.D. student and US citizen, was arrested in Iran on August 8, 2016, while researching Persian history for his doctoral thesis, July 18, 2017.  

© 2017 Reuters