Sudan

A little-known program allows some immigrants to stay in the U.S. when a disaster strikes their home country. Designed to be short-term, Temporary Protected Status can sometimes last for many years.

Ryan Boyette arrived in the Nuba Mountains more than a decade ago and has made it his mission to document abuses he says the government carries out with regularity.

The U.S. is supposed to allow everyone to come to the annual United Nations General Assembly, which opens next week. But Washington has yet to rule on the visa application by Omar al-Bashir, the Sudanese president who's been indicted on genocide charges by the International Criminal Court.