That moderator in politics keeps changing my posts! BM would never say numpty, that's a very silly word!
The 21/7 bombers only failed to kill and maim dozens of Londoners because the bomb-making "mastermind" could not do basic mathematics it emerged today, as the four men were convicted by a jury.
The 21/7 plotters planned to cause "bigger and better" explosions on public transport than the bombers a fortnight earlier, who killed 52 people.
However, none of the rucksack devices exploded as ringleader Muktar Said Ibrahim had a poor grasp of mathematics and wrongly calculated the ratio of ingredients needed to trigger the explosions.
http://www.google.co.uk/imgres?imgurl=h ... CDAQ9QEwBQ