More than half a million Rohingya have fled Myanmar in the past six weeks, and now the world is facing a humanitarian crisis of historic proportions.
June 20 is World Refugee Day. The world counts more than 25 million refugees who have been forcibly displaced due to war, violence and persecution. Since 1975, more than 3.3 million refugees have been admitted to the United States. Mohamed Heval Kelli was one of them. This is his story: