It is eight years since Osama bin Laden, the founder of al-Qaeda, was killed by US forces in the Pakistani town of Abbottabad.
So how influential is the group today, and what threat does it now pose to global security? While IS has dominated the headlines in recent years, al-Qaeda has been pursuing a strategy of quietly rebuilding and forging alliances with regional groups.
In its latest report, US National Intelligence has warned that senior al-Qaeda leaders are “strengthening the network’s global command structure and continuing to encourage attacks against the West and the United States.”