Alison Jackson

You can watch a little bit of war from your nice living room - 30 seconds of what's going on in Syria - and when you've had enough, switch over to some celebrity programme. We live our life through screens and images in this way, and we don't know what is real or fake anymore. It doesn't matter.

Because Bin Laden's culture doesn't permit the worship of images, they understand how powerful images are. We wouldn't have thought of creating a visual bomb. In a way, he's chopped down two iconic buildings, and used our very truth imagery, to express himself. It's fascinating... I mean, dreadful.

We live in a crazily youth-orientated world nowadays. It's a trickle-down thing. We see pictures of lithe, attractive celebrity couples such as Brad and Angelina or the Beckhams cavorting around, covered in tattoos, stomachs as flat as the singing in early 'X Factor' rounds.