Because of great vigilance by police with modern technology. Because bombs were planted near shops and clubs. Level of those involved was just like a boy copying blindly to get 35 marks. There was perhaps no involvement and support from ALQ. People involved were over religious and concentrated more on their would be fame than end results. Suppliers fooled them by selling Diwali crackers than actual bombs. Only point was planners were 200% sure that all human right organizations are going to keep quiet meaning indirect support.
