Saira Rafiee boarded a plane in Tehran this weekend on her way to New York. She had been visiting family in Iran and needed to get back to the U.S. in time for classes at City University of New York’s Graduate Center, where she is a Ph.D. student in political science. But, as a result of President Trump’s executive order restricting the travel of citizens from seven majority-Muslim countries, including Iran, Rafiee says she was detained in Abu Dhabi in the United Arab Emirates and, after nearly 18 hours, sent back to Tehran.