KIGALI, RWANDA - APRIL 11:  Thousands of people march to a commemoration ceremony at the Nyanza-Kicukiro genocide memorial, 20 years after 2,000 people were killed by the extremist government and Interahamwe militia after being abandoned by United Nations troops during the 1994 genocide, April 11, 2014 in Kigali, Rwanda.  The forced march and slaughter of Tutsis that took refuge with UNAMIR troops from Belgium at the nearby technical college are seen by Rwandans as an example of their abandonment by the international community. It has been 20 years since an extremist government began 100 days of terror in which more than 800,000 ethnic Tutsis and moderate Hutus were killed.  (Photo by Chip Somodevilla/Getty Images)