The term 'Muslim Brotherhood'... is an umbrella term for a variety of movements: in the case of Egypt, a very heterogeneous group, largely secular, which has eschewed violence and has decried Al Qaeda as a perversion of Islam.

The Salafists, the Muslim Brotherhood, and Al Qaeda in Iraq are the major forces driving the insurgency in Syria.

ISIL particularly is very slick, very sophisticated, proselytizing and recruiting, and they are very astute users of social media.

Islam was like a mental cage. At first, when you open the door, the caged bird stays inside: it is frightened. It has internalized its imprisonment. It takes time for bird to escape, even after someone has opened the doors to its cage.

We try to bring a variety of movements.

If ISIL were to substantially increase the priority it places on attacking the West rather than fighting to maintain and expand territorial control, then the group's access to radicalized Westerners who have fought in Syria and Iraq would provide a pool of operatives who potentially have access to the United States and other Western countries.