File photo of Rwandan Hutu refugees resting on the side of the road next to the old Mugunga refugee camp

Rwandan Hutu refugees rest on the side of the road next to the old Mugunga refugee camp near the border town of Goma in this November 16, 1996 file photo. April 7, 2014 marks the 20th anniversary of the Rwanda genocide which killed 800,000 people. The three-month killing spree in 1994 by Hutu extremists targeted ethnic Tutsis, but moderate Hutus were also caught in the wave of violence that followed the fatal downing of a plane carrying Rwandan President Juvenal Habyarimana. (Reuters)

Rwandan Hutu refugees rest on the side of the road next to the old Mugunga refugee camp near the border town of Goma in this November 16, 1996 file photo. April 7, 2014 marks the 20th anniversary of the Rwanda genocide which killed 800,000 people. The three-month killing spree in 1994 by Hutu extremists targeted ethnic Tutsis, but moderate Hutus were also caught in the wave of violence that followed the fatal downing of a plane carrying Rwandan President Juvenal Habyarimana. (Reuters)