TERRORISM

While the facility was dismantled, its capture by the terrorist organization encapsulates the risks inherent in Iraq's new conflict.

"American forces will not return to combat in Iraq," the president said, calling those being deployed "military advisers."

Global oil prices, currently around $114 per barrel, would have to pass $120 to sharply slow the world economy.

The remaining troops are reportedly still in the area, where the operation against the Abu Sayyaf extremist group was taking place.

ISIS forcefully shut down Baiji refinery before taking full control of the facility, leading oil prices to climb nearly 0.5 percent.

ISIS, the organization that now controls northern Iraq, was until this winter a branch of al Qaeda. How did it become so powerful?

There was no immediate word on casualties but a Reuters witness near the scene heard a loud boom. Some residents said they also heard a second explosion.

Researchers from West Point explain what governments don't understand about terrorist and criminal groups -- and how to stop them.

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Abu Sayyaf, founded in 1990 in the province of Basilan, 880 miles south of Manila, is linked to al-Qaida.

"The reality is, U.S. and Iranian interests and goals do not align in Iraq," McCain said.

The Islamic State of Iraq and Syria shipped jihadists to the Middle East from Spain, according to the country's interior ministry.

The captions on the photos said “hundreds have been liquidated” and showed grisly images of dead soldiers.

The Iraqi military has reportedly stopped the advance of ISIS north of Baghdad, but the US is moving personnel out.

Syria is not only back on a campaign against ISIS, it is working directly with the Iraqi government.

Residents are returning to Mosul after ISIS seized control of the city last week.

ISIS captured huge amounts of military equipment from fleeing government troops

Shakir Wahiyib's "Quranic quiz" lifted him from obscurity to feared terrorist.

The terrorist group that's threatening Baghdad used to be called ISI unti 2012, then changed names as it expanded into Syria.

The micro-blogging service remains littered with violent posts.

The jihadist group just looted more than $400 million, but has been making millions for years through extortion and donations.