Salafi-Jihadism has had a huge impact on the societies, policies, and security situations in MENA and abroad. But where did modern Jihadist groups come from, what do they look like today, and what impact has the "War on Terror" had on people living in Western states? To tell us about the movement as well as give thoughts on how current events like the Taliban takeover of Afghanistan has on the ability of transnational Jihadist organisation to regroup, is Thomas Hegghammer - a senior research fellow at the Norwegian Defence Research Establishment and the author of The Caravan: Abdallah Azzam and the Rise of Global Jihad.