From a Radiohead Interview:
Interviewer: "It sounds lovely, but you've said it was the angriest thing you've ever written."
Thom: "Yes. Well, yeah, I guess it is. It's quite simple really. I had an extremely unhealthy obsession that ran through the Kid A thing about the first Gulf War. When they started it up, they did that lovely thing of putting a camera on the end of the missile, and um, you got to see the wonders of modern military technology blow up this bunker.
And then sometime afterwards in the back pages, it was announced that that bunker was not full of weapons at all -- but women and children. And it was actually a bomb shelter.
And so, everybody, we all got to witness the wonders of modern technology. And um, I, you know, it ran through so much stuff for so long for me -- I just could not, um, get that out of my head. It was so sick. And so that's where that anger comes from."
(XFM interview, spring 2003)