MIAMI — After Florida International University’s police department entered into an agreement with the federal government to carry out immigration enforcement on campus, some students say they are terrified. “It’s scary and nerve-racking,” said an undergraduate at the university. The student, who's not being identified because he lacks legal immigration status, told NBC News he came to the U.S. when he was 5 with his family after they were threatened by gangs in their native El Salvador. FIU is one of a number of universities in Florida that have signed agreements with U.S. Immigration and Customs Enforcement under the 287(g)...