These pictures, provided by ABC news, are chilling.
The mention also that the July 7 London Bomb Plot may have been planned to attack a much larger scale. Thankfully it seems that the British Police got to the car with the 12 bombs in, intended for a second attack, before the bombers did.
QUOTE: "Sources familiar with the investigation tell ABC News an additional 12 bombs and four improvised detonators were found in the trunk of a car believed to be rented by suicide bomber Shehzad Tanweer. Police believe the bombers drove the car to Luton, where they boarded trains to London."