PoliticsUS Travel ban affects scientific exchange To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoPolitics01/31/2017January 31, 2017Since President Trump announced his travel ban, people can't get into the US although they have valid documents. One such person is an Iranian doctoral candidate from Berlin. She could not visit a scientific congress at Stanford due to the ban.https://p.dw.com/p/2WjDhAdvertisement