Attackers united by youth and driven by a search for meaning

Salman Abedi was aged 22 when he carried out the Manchester Arena attack.Divided by geography, ideology and method, the majority of terror attackers and their radicalised networks nevertheless usually have one thing in common – their age.From far-right attackers such as Dylann Roof, who had recently turned 21 when he killed nine people in a Charleston attack, to Islamist militants such as the Manchester Arena bomber Salman Abedi, aged 22 when he blew himself up outside a concert and killed