Twenty years ago today, the US was struck by the World Trade Center attacks. Those attacks had a profound effect on many different levels and marked the beginning of the War on Terror — ushering in a US-led military intervention in Afghanistan in 2001 and in Iraq in 2003. Two decades later, the withdrawal of US troops from Afghanistan has come to an end, as US President Joe Biden has announced the end of America's "longest war" while the Taliban have taken control of Afghanistan once again.
Twenty years after 9/11, how has jihadism evolved in different regions of the globe? And how will the Taliban’s victory affect the narrative and mobilization of jihadi actors?