ABC News June 13, 2014

A Simple and Useful Guide to Understanding the Conflict in Iraq

WATCH: President Obama Considers New Military Options for Iraq

An Extremist Group Called ISIS Took Over Multiple Cities in Iraq

Reuters
Fighters of the Islamic State of Iraq and the Levant (ISIL) celebrate on vehicles taken from Iraqi security forces, at a street in city of Mosul, June 12, 2014. Black clad ISIL fighters have seized Iraq's second biggest city Mosul and Tikrit, as well as other towns and cities north of Baghdad.

Can You Remind Me About Sunnis, Shiites, and Kurds Quickly?

AP Photo
Map locates cities in Iraq that were sites of attacks.

Why Do Sunnis Want an ISIS Takeover?

AP Photo
Refugees fleeing from Mosul head to the self-ruled northern Kurdish region in Irbil, Iraq, June 12, 2014.

Want to know more? You can read all about the ISIS here, and all about the conflict in Iraq here.