When Quiana Childress was a little girl, she knew what she wanted to be -- a doctor.
That dream didn't seem likely for Childress, who grew up in a family of 10 children fighting poverty in Arkansas.
"Sometimes, I would go to bed hungry," Childress recalled. "My mother would try to portion out the food for each one of us. Sometimes, it wasn't enough."
To support herself and her family, 16-year-old Quiana trained as a nursing assistant and went to work, but her home was falling apart.