Interviews, documents and jailhouse recordings reveal a clearer picture of the life and death of the 26-year-old emergency room technician.

Thousands of internal documents help explain how, through brutality and bureaucracy, the Islamic State stayed in power for so long.

Modern methods allow the Islamic State to keep up its systematic rape of captives under medieval codes.

The system of organized sexual slavery at the heart of ISIS.

An isolated 23-year-old Sunday school teacher living with her grandparents makes a new group of friends online who mail her chocolates and cash.

A profile of Moktar Belmoktar, Al-Qaida’s “most difficult employee,” who was responsible for a major attack on an Algerian BP plant and, according to U.S. and Libyan forces, was killed in an air strike on Sunday.

While fleeing their Mali stronghold, al-Qaida left behind documents describing not how to terrorize a population, but how to govern.

Chérif and Saïd Kouachi’s path to the Paris attack at Charlie Hebdo.

Those who survived tell the story of twenty three ISIS hostages’ shared months of brutal captivity before some were ransomed and some executed.