Organizational details are situation-specific.
There are, however, a few general organizational principles. Because terrorists must operate in a hostile environment, security is their primary concern. Security is best served by a cellular structure in which members do not know and cannot identify more than a few of their colleagues in the event of capture or defection. Yet, terrorists are not immune to human weaknesses. Unless they are united by a charismatic leader, terrorists are affected by group dynamics that produce both problems and opportunities for security forces.