Alison Des Forges , top adviser for Human Rights Watch 's Africa Division , killed . Spent years in Rwanda , documented genocide , tried in vain to warn the world . Group calls her loss devastating blow to human rights activism and Rwanda . Alison Des Forges died in the crash of Flight 3407 outside Buffalo , New York , on Thursday night . Comment:
Alison Des Forges , top adviser for Human Rights Watch 's Africa Division , killed . Spent years in Rwanda , documented genocide , tried in vain to warn the world . Group calls her loss devastating blow to human rights activism and Rwanda . Comment: