jp provided some good links, over at American Samizdat, about the Rawanda genocide.
A call to action
Researcher examines U.S. role in the atrocities of the 20th century
Carr Center for Human Rights Policy
Bystanders to Genocide
The author's exclusive interviews with scores of the participants in the decision-making, together with her analysis of newly declassified documents, yield a chilling narrative of self-serving caution and flaccid will —and countless missed opportunities to mitigate a colossal crime