More than 800,000 people, mainly Tutsi, were massacred in Rwanda in 1994. For three decades, researchers have studied the last mass violence of the 20th century.
Raphaël Nkaka has analyzed the history of racism and racial policies in his country. Hélène Dumas, author of “Le Genocide au village,” admits that it is difficult to receive testimony of someone who went through this barely imaginable experience, she tells CNN.