Ji-Young Lee, American University School of International Service
North and South Korea explained in four questions and answers.
At the United Nations’ prisoner-of-war camp at Pusan, North Korean and Chinese prisoners are assembled in one of the camp compounds.
Wkimedia/Larry Gahn/US State Department
This isn't the first time the US has banned people based on nationality. History shows these exclusions have put our national security at risk and caused rifts with foreign allies.
Theodore E. Gildred Chair in U.S.-Mexican Relations, Professor of Sociology, and Co-Director of the Center for Comparative Immigration Studies, University of California, San Diego