1. Burundi

Burundi, a land-locked country in East Africa, collapsed into chaos after President Pierre Nkurunziza pursued and won a third term in office last year. Protests ensued, and many were killed by police. In January, rights group Amnesty International released satellite imagery revealing five possible mass burial sites.

As a result of the violence, 300,000 people became displaced inside the country or fled to Tanzania, Rwanda, Democratic Republic of the Congo and Uganda. Outside of the country, some risk being targeted by armed groups and security forces. "The risk of exploitation of the refuges and abuse is tremendous," says Michel Gabaudan, president of Refugees International. Funding is also concern. To date, the United Nations refugee agency has less than 30 percent of its Burundi operation funded.

