Peter Bergen : Somalia was first major country in which terrorists provided Twitter commentary . Terrorism has always been about violence , but use of social media took it further , he says . Bergen says Al - Shabaab 's attacks were a way for the group to shape media coverage .
Peter Bergen : Kenya was first major attack in which terrorists provided Twitter commentary . Terrorism has always been about theater , but use of social media takes it further , he says . Bergen says Al-Shabaab 's tweets were a way for the group to shape media coverage .