They share a deep sorrow: an idealistic American who tried to protect the Kurds of Iraq, a Canadian general who refused to follow orders in Rwanda, a French priest who fought for the soul of Cambodia.
Each one tried to focus the world's attention on the world's most heinous crime: genocide. Each time, they were shunned, ignored or told it was someone else's problem.
To understand why, CNN's Christiane Amanpour traveled to the killing fields of Europe, Africa and Asia for a two-hour documentary, "Scream Bloody Murder." 
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CNN's Christiane Amanpour, Andy Segal, Jennifer Hyde and Ken Shiffman contributed to this report.
All About Genocide • Cambodia • Rwanda • Bosnia and Herzegovina • The Holocaust • Darfur • Iraq
