One of America’s most prolific female serial killers was Aileen Wuornos. She admitted to killing at least seven men before she was executed in 2002. Her life was depicted in the 2003 movie Monster. But how did the little girl, tormented by schoolmates as "the cigarette pig," become a monster?

The Backstory: Buzz Aldrin: To the Moon and Back
06:21

The Backstory: Frozen … Then Waking Up a Century Later
10:11

The Backstory: Shocking Items from the Sears Catalog
06:44