7 July 2005 London bombings

On 7 July 2005, a series of suicide bombings were committed by Islamic extremists around various sites in London, England: three in the London Underground and a fourth on a bus in Tavistock Square. The event is often referred to as 7/7. The bombers responsible were Mohammad Sidique Khan, Shehzad Tanweer, Hasib Hussain, and Germaine Lindsay. 56 people were killed in the bombings.

Conspiracy theory
Just as with every major terrorist incident, conspiracy nuts came crawling out from their underground bunkers to argue that the London bombings weren't actually committed by the accused men. This has mostly taken the form of garishly-designed blogs, amateur videos, and lectures delivered to the nuttier wing of the Muslim community.

The 7/7 Ripple Effect, an amateurly produced conspiracy film that you can watch in its entirety on YouTube, is the July 7 equivalent of Loose Change. It was produced by "Muad Dib", who is not a Muslim, incidentally, but a pseudonym derived from Frank Herbert's Dune novel; Dib is actually a Sheffield-born man living in Ireland named John Hill, who believes that he is the Messiah.

One of the constant nagging pains for the conspiracy crowd has been the presence of Rachel North, a writer and blogger who was on one of the trains that was attacked and has skewered their theories in the media. They generally respond by claiming that she is a fictional person invented by the government for some nefarious purpose or other.