FILE - In this Feb. 14, 1996 file photo, a Rwandan Hutu refugee rests on her cane while waiting to be repatriated, in the Kibumba, refugee camp, 20 miles northeast of Goma in eastern Congo, then Zaire. The discovery of mass graves prompted investigations that led to a controversial U.N. report published on Oct. 1, 2010 which accuses invading Rwandan troops of killing tens of thousands of Hutus 1996 and 1997. (AP Photo/Jean-Marc Bouju, File)