How much do you believe? Do you have any doubts? Mind deprogramming might just be called for.
7/7 Mind the Gap is an interesting documentary about how the Intelligence Services have played a role in the London bombing. The story is compelling so I recommend taking a look.
MI5 whistleblower David Shayler presents new evidence to demand London bombings enquiry. A very detailed and well evidenced documentary
linkage: mind deprogramming 7/7 mind the gap