Boko Haram drew worldwide condemnation two years ago when the Nigerian extremist group kidnapped more than 250 girls from a school in Chibok, in northeastern Nigeria.
To this day, most of the girls are still missing. Last week, CNN aired a video purportedly showing several of them alive.
A few of the girls managed to escape — including 20-year-old Sa'a, a pseudonym she uses to protect herself. Last week she spoke with members of Congress, renewing calls for the United States to support Nigeria in the fight against Boko Haram.