CARL CASTELING BOTHA
Sir the answer has actually got three legs.  Firstly the maximum disruption of the structure as I have explained it before.  The second leg would be to send a very strong message to the interested parties that they are being monitored and that there are people who are aware of their activities.  The third leg would be that there is a possible connection that could be made to them in that it could possibly be one of their bombs that exploded.  And the fact that those involved will know that it is not will create a feeling of intimidation.