ISIS

At least 100 Americans have gone — and some continue to go — to Syria to fight against ISIS. Many have joined a Kurdish militia group called the People's Protection Units or the YPG. What these volunteers are doing isn't illegal, but it raises many questions.

When ISIS invaded northern Iraq, they captured many Yazidi women, forced them to convert to Islam and traded them as sex slaves. The Yazidi community granted photographer Marcio Pimenta rare access to capture moving images of the reintegration process for freed women rejoining the group.

Over 600 people including ISIS fighters and their families were escorted from the Lebanon border by Syrian government forces. That angered the US, which launched airstrikes to block their path to a town near Iraq.

ISIS militants are being squeezed out of their final strongholds in eastern Syria.

With ISIS losing territory in Syria and Iraq, what will happen to their wives and children? We spoke to Borzou Daragahi of BuzzFeed News, who recently reported on meeting some of these women in Syria.

Laleh Khadivi's new novel chronicles the transformation of a lackadaisical, college-bound Californian into a soldier for militant Islam.

Amnesty International says the US-led coalition may have committed war crimes against civilians when driving ISIS out of Mosul.

There have been repeated rumors that the ISIS leader is dead, but the Pentagon says it cannot corroborate the reports. Now the Syrian Observatory for Human Rights says it's obtained information from ISIS leaders of Abu Bakr al-Baghdadi's death.

French President Emmanuel Macron was among the first world leaders to congratulate "our troops, who contributed to this victory."

The battle is still raging in the northern Iraqi city of Mosul. Iraqi and coalition forces are advancing slowly, capturing as little as one city block per day — if that. And ISIS fighters continue to strike back.