How did Omar Mateen get his weapons, and what did his wife know?
The head of U.S. intelligence says the militant Islamist group poses the greatest threat online
Ardit Ferizi stole data about U.S. service members and gave it to Islamic militants
Request comes after Boko Haram attack killed 26 soldiers
Friends, family, and former co-workers paint very different pictures of Orlando attacker
In the aftermath of the Orlando shooting, Washington should step up and make the nation safe again
A grieving community rallies in the face of the deadliest mass shooting in U.S. history
Analysts warn military victory won't stick as long as the country's political situation remains unstable
Investigators are looking into shooter’s possible connections to international terror group
Human rights activists urge international community to help counteract Boko Haram and other insurgent groups in the country
