A lot of movements use women's involvement to shame men when recruitment is sagging.

Misuse of the Koran to provide legitimacy for violence is common, particularly in Europe, where terrorists tend not to be well-educated Muslims.

A lot of movements use women's involvement to shame men when recruitment is sagging.

Women are secretaries of state and prime ministers - but people still don't expect women to be involved in violence.

When the bombers are women - and children, which I predict we'll see more of - the terrorists get more bang for their buck, because there's more media attention.

It's cheap, and you have a thinking, breathing bomb that can adjust to circumstances and cross the street to hit another target if the original one doesn't look good.

With a civilian target, female bombers tend to be more successful and cause more damage.