genocide

Performers re-enacting some of the events enter a public ceremony to mark the 20th anniversary of the Rwandan genocide, at Amahoro stadium in Kigali, Rwanda Monday, April 7, 2014. Sorrowful wails and uncontrollable sobs resounded Monday as thousands of Rwandans packed the country's main sports stadium to mark the 20th anniversary of the beginning of a devastating 100-day genocide.

Ben Curtis/AP

Performers mark the 20th anniversary of Rwanda’s genocide at a ceremony in Amahoro stadium, Kigali, Rwanda.

Police clash with protesters at the annual rally to protest the mass killings of Armenians in Ottoman Turkey nearly a century ago in Thessaloniki, Greece on Wednesday April 24, 2013. About 250 protesters, mostly from Greek-Armenian groups, gathered outside the Turkish consulate. About 20 countries worldwide, including Greece, as well as the European parliament recognize the mass killings as an act of genocide, despite strong objections from Turkey.

Nikolas Giakoumidis/AP

Police clash with protesters at the annual rally against the mass killings of Armenians in Ottoman Turkey nearly a century ago, in Thessaloniki, Greece on Wednesday. About 250 protesters, mostly from Greek-Armenian groups, gathered outside the Turkish consulate. About 20 countries worldwide, including Greece, as well as the European parliament recognise the mass killings as an act of genocide, despite strong objections from Turkey.