NaG Director Hassan Hassan was quoted in an article about ISIS in Iraq in 2019-2020:
The atomization of the Islamic State’s logistical tail and bed-down locations into hundreds of subterranean shelters recalls Hassan Hassan’s December 2017 description in this publication of “small, self-sustained, and autonomous localities to enable militants to defend their areas with minimal movement and without the need for resupply from other districts.”
Read more at the Combating Terrorism Center.
