Learn more about the Islamist group Boko Haram.
Boko Haram has terrorized northern Nigeria regularly since 2009, attacking police, schools, churches and civilians, and bombing government buildings. At least 5,000 people have died at Boko Haram's hands, according to a U.S. Congressional Research Service report, making it one of the world's deadliest terrorist organizations.
German Federal Archive/Wikimedia Commons
From Facebook/Treven Anspach via CNN
Andreas Rentz/Getty Images
Library of Congress
U.S. Postal Service
Sign up for Breaking News, Daily Headlines, Severe Weather Alerts & more!