Universities across the U.S. say President Donald Trump’s ban on travelers from seven Muslim countries is disrupting research projects and academic exchanges in such fields as medicine, public health and engineering

The Associated Press
Iranian-born bioengineer researcher Nima Enayati works on a robotic surgery machine during an interview with the Associated Press at the Polytechnic University of Milan, Italy, Tuesday, Jan. 31, 2017. An Iranian researcher at Milan’s Polytechnic University, Enayati was refused check-in Monday at Milan’s Malpensa Airport for his U.S.-bound flight on Turkish Airlines after the Trump administration’s executive order came down. (AP Photo/Luca Bruno)

The Associated Press
Iranian-born bioengineer researcher Nima Enayati stands as he works on a robotic surgery machine during an interview with the Associated Press at the…