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.
Doug Benc/Getty Images
Jed Jacobsohn/Getty Images
Frazer Harrison/Getty Images For Relativity Media
Justin Sullivan/Getty Images
West Virginia Department of Transportation
Jason Merritt/Getty Images for BWR
Sign up for Breaking News, Daily Headlines, Severe Weather Alerts & more!