This week began with chaos at Kabul airport as crowds of Afghans and foreign nationals sought to flee the country. It ends with bloodshed at the same location.

Yesterday, a gun and suicide bomb attack targeted desperate people who had gathered outside the airport gate in the hopes of catching a flight out. As of this morning, at least 95 Afghans and 13 U.S. troops are known to have been killed. Within hours of the assault, ISIS-K, a group affiliated with the Islamic State group, claimed responsibility.

The attack is the highest profile operation conducted by ISIS-K, but the group is not a new terrorist organization. Terrorism experts Amira Jadoon and Andrew Mines have been tracking ISIS-K for years and answered our questions about who ISIS-K is, what it wants and how big a threat it now poses in a destabilized Afghanistan.

Also today:

Matt Williams

Breaking News Editor

ISIS-K, an affiliate of the Islamic State group, has claimed responsibility for the Kabul terrorist attack. Wakil Kohsar/AFP/Getty Images

What is ISIS-K? Two terrorism experts on the group behind the deadly Kabul airport attack and its rivalry with the Taliban

Amira Jadoon, United States Military Academy West Point; Andrew Mines, George Washington University

An attack on the Kabul airport has left scores dead and many more injured. Two terrorism scholars explain who the group thought responsible is, and how big of a threat is it.

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