This is a guest post from Tanisha Fazal, a professor of political science at Columbia University, and Jessica Martini, a human rights and international trade attorney based in New York City.To conduct research on terrorism and insurgency, it’s best to be able to talk to people. Combing through incident reports is helpful, but often an informal conversation over a cup of tea is as, if not more, illuminating. But according to ban on providing “material support” (18 United States Code (U.S.C.) 2339B), buying a cup of tea for a terrorist can land you in [US] jail. In 1996 the Antiterrorism...