So, who built the Stuxnet worm?

Insecurity firms are agreed that the Stuxnet worm is a crafty piece of work, built by well-resourced people who knew their onions.

The worm has reportedly attacked thousands of computers in Iran and was crafted to specifically attack software built by Siemens that just happens to be installed in Iran's Bushehr nuclear plant, whose systems are said to be riddled with the worm.

So, who crafted the worm?

1. A spotty hacker in his back bedroom/Gary McKinnon

2. Bill Gates

3. Mahmoud Ahmadinejad

4. A group of people in a certain paranoid Middle Eastern country, infamous for flouting international law, treating the residents of territories it occupies as sub-human and launching mass email campaigns at anyone online who happens to be critical of its policies.

Answers on a postcard please.