Teen exorcists say they are in a 'spiritual battle'
9 September 2013 Last updated at 18:03 BST
Brynne Larson and Tess and Savannah Scherkenback are all-American girls from Arizona, who enjoy martial arts and horse riding, but something sets them apart from most teenagers - they perform public exorcisms.
The girls are black belts in karate, but because of their particular Christian beliefs, they have also decided to do battle, they say, against evil spirits or demons. They believe these demons can possess a human being and cause suffering, depression or addiction.
The girls talk about the moment they first bonded in a karate class and how they believe they are fighting a spiritual battle.