By: Mark Leon Goldberg on March 17, 2016 The Islamic state is seemingly on the ascent in Libya. It controls territory, including the coastal city of Sirte, and over the past several weeks it has launched a series of spectacular attacks in Libya and Tunisia. So how did ISIS gain a foothold in Libya? I put that question to Aaron Zelin, a fellow at the Washington Institute for Near East Policy, Phd candidate and proprietor of Jihadology.net. Aaron explains how the Islamic State in Libya can trace its start to the US invasion and occupation of Iraq in the mid 2000s, and how through a series of contests it muscled out other jihadist groups in Libya to become a potent and destabilizing force for the entire region. If you are interested in learning more about what will be one of the defining global security challenges of the near future, have a listen. Subscribe on iTunes, Stitcher or get the app to listen later.