Source: Collen Curry / ABC News
But the group has long terrorized residents of northern Nigeria — especially Christians, according to one survivor of an attack.
Habila Adamu, a resident of northern Nigeria, survived a mass killing of Christians by Boko Haram two years ago and came to the United States to share his story last year.
He recalled how gunman bearing AK-47s went around his neighborhood shooting and killing Christians who refused to accept Islam.
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