FILE - In this Aug. 20, 1994, file photo, Rwandan refugee children plead with Zairean soldiers to allow them across a bridge separating Rwanda and Zaire where their mothers had crossed moments earlier before the soldiers closed the border, in Zaire, now known as Congo. Twenty-five years ago Rwanda descended into violence in which some 800,000 Tutsis and moderate Hutus were massacred by the majority Hutu population over a 100-day period in what was the worst genocide in recent history. (AP Photo/Jean-Marc Bouju, File)