Sultan is one of at least 12 Ohio State international students who've had their visas revoked by the Trump administration in the last several weeks.

How do student visas work? Coming to the United States for anything but tourism usually means wading through an alphabet soup of visa types – more than two dozen for people who do not intend to become permanent residents of the US.

A federal judge ordered the U.S. government to reinstate the immigration status of 133 students by Tuesday evening.