There is a possibility that many countries may close their borders. Some of these countries are in Europe. Over time, women have become raped by people who are entering into a country without going through any channels. Some of these people are immigrants and others are able to slip through without being detected as a criminal. In other words, these people once lived in this country and then moved.
While they were away, they committed a crime and fled that country to go back to their homeland. Now their native country is harboring a fugitive. This puts its own citizens at risk of a criminal committing another crime. Therefore, Europe may become closed in the near future if the start experiencing troubles with citizens and terrorists.