People who want to visit the United States could be asked to hand over their social-media passwords to officials as part of enhanced security checks, the country's top domestic security chief said. From a report on NBC: Homeland Security Secretary John Kelly told Congress on Tuesday the measure was one of several being considered to vet refugees and visa applicants from seven Muslim-majority countries. "We want to get on their social media, with passwords: What do you do, what do you say?" he told the House Homeland Security Committee. "If they don't want to cooperate then you don't come in."