Free to Think talks with Xiyue Wang, a PhD candidate in history at Princeton focused on Imperial Russia, the USSR, China and the late Ottoman Empire. In May 2016, Wang visited Iran to do archival research with approval of Iranian authorities. He was later detained, charged with espionage, convicted and sentenced to 10 years. He was eventually released in a prisoner swap. Wang talks with Free to Think about the dynamics of state hostage-taking and international campaigns for prisoners’ release.