The genocide in Rwanda 12 years ago was the most efficient ever carried out. 800,000 people were slaughtered in 100 days. One incredible and inspiring survivor's tale has come to light only recently. It took Immaculee Ilibagiza, a college-educated young woman from a remote village, many years before she could confront the horrors she lived through. She is speaking out now, she says, to prevent further atrocities. It was extremely low tech ... just machetes, spears and knives, wielded by Hutus, the majority tribe as they tried to wipe out the minority Tutsis. [They] were slaughtered in their tracks, wherever they were found. When it was over, three out of every four Tutsis in Rwanda had been killed. When it began, Immaculee's father told her to run to a minister's house three miles away, and to beg him to hide her. The minister was a Hutu. [He] put Immaculee and six other women in a tiny, rarely used bathroom in a remote corner of the house. Seven women were huddled in a bathroom measuring three feet by four feet, for 91 days. They took turns standing and stretching. They were searching. They were there all the time," Immaculee remembers. She lost 40 pounds - one third of herself. What prompted the genocide? The Hutus had long-standing resentments against the Tutsis, who formed the nation's elite. There are things you can point to, but ... what could possibly explain what happened? Immaculee knows Rwandans can never forget but believes they must forgive. Revenge ... only prolongs the pain. Now she's a woman on a mission to spread the story ... hoping it can prevent future atrocities. She has giving lectures; she has written a book; and she is determined to stop the inevitable revisionists who claim the genocide never happened.