I did a study of soldiers returning from Iraq, and their levels of PTSD were much higher if they had had to shoot a woman or child, even if they knew the person was a suicide bomber.

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

Acts perpetrated by women, particularly attractive women, get far more media attention.

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.

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

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

I did a study of soldiers returning from Iraq, and their levels of PTSD were much higher if they had had to shoot a woman or child, even if they knew the person was a suicide bomber.