On January 20th, the White House released an executive order directing certain federal agencies to identify, within 60 days, "countries throughout the world for which vetting and screening information is so deficient as to warrant a partial or full suspension on the admission of nationals from those countries."  Starting around March 21st, these agencies may issue new travel restrictions.  When considering travel outside of the U.S., keep in mind that entry requirements may change unexpectedly. If you cannot afford interruptions to your studies, research, employment, or teaching due to an extended stay abroad, you should carefully weigh the necessity of traveling outside the U.S.