Islamic State

U.S. defense and intelligence officials tell NPR that the list appears to have been derived from publicly available sources and not a breach of a government server.

The militants have held Iraq's second largest city since June. Now, local Sunni residents are weary of ISIS, there are signs of strain within their ranks, and it's almost impossible to flee.

A German-Syrian religious studies teacher was shocked when she heard that five of her former students had left Germany to join jihadist groups in Syria. "It felt like a personal defeat," she says.

Some Egyptians have decided to fight back against ISIS propaganda with parodies of the militant group's gruesome videos.

Once, Syria was a modern nation. Today, after five years of brutal conflict, 83 percent of the country's lights are out and life expectancies are 20 years shorter.

ISIS militants now control the long-running black market in stolen artifacts. Experts are tracking damage to heritage sites in Iraq and Syria by satellite and doing what little they can to stop it.

The self-proclaimed Islamic State has recruited more than 2,000 young Saudi men. Some have already come back to carry out attacks on Saudi soil. The kingdom is preparing to confront the threat.