Academically , he has developed the concept of netwar , or " swarm-tactics " , referring to the particular fighting-style of network-organised groups . Networked cells can share precise information on a need-to-know basis without a hierarchical structure . This gives them the ability to disperse and " swarm " in an extremely effective manner , as witnessed in the 9/11 attacks
9/11 attacks
September 11 attacks
John Arquilla