Leaders of the M23 rebel group gather near the eastern city of Goma, Democratic Republic of Congo, in June. The group, which recently suffered several military defeats, announced Tuesday it was calling off its nearly 2-year-old rebellion. AFP/AFP/Getty Images hide caption

itoggle caption AFP/AFP/Getty Images

Fleeing the fighting: Internally displaced Congolese sit inside a United Nations base in Monigi, near Goma, as they seek shelter from the violence. Phil Moore/AFP/Getty Images hide caption

itoggle caption Phil Moore/AFP/Getty Images

A medical worker from the U.S. Centers for Disease Control and Prevention works at the laboratory in Uganda where Ebola specimens were tested at the start of the latest outbreak in the Democratic Republic of Congo. Stephen Wandera/Associated Press hide caption

itoggle caption Stephen Wandera/Associated Press

Bonobos at the Lola ya Bonobo sanctuary in the Democratic Republic of Congo. Courtesy of Vanessa Woods hide caption

itoggle caption Courtesy of Vanessa Woods