A profile of typical Islamicist terrorists.
Salman Abedi: why Manchester bomber fits profile of other terrorists
Some interesting takeaways:
Most attackers are not lone wolves.
Almost half talk about their inspiration and plans with family and friends before carrying out the attack.
Most attacks are carried out by people who have recently travelled to the Middle East or their country of origin.
Most attacks take place within a hour travel of the perpetrator's home.