FILE - In this Wednesday, May 9, 2018 file photo, Hua Qu, the wife of detained Chinese-American Xiyue Wang, poses for a photograph with a portrait of her family in Princeton, N.J. Iran's foreign minister says a detained Princeton graduate student will be exchanged for an Iranian scientist held by the U.S. Mohammed Javad Zarif made the announcement on Twitter on Saturday, Dec. 7, 2019. The trade involves graduate student Xiyue Wang and scientist Massoud Soleimani. Wang was sentenced to 10 years in prison in Iran for allegedly “infiltrating” the country and sending confidential material abroad. His family and Princeton strongly denied the claims. (AP Photo/Matt Rourke, File)
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