How do we know we are defenceless, whether it be by land, sea or air, do we honestly think that we, the man in the street, is told everything about our country's capabilities in time of need. I think on matters like this the barbers and the taxi drivers don't know everything and that we have somehow got to put our trust in those that serve in unseen (per se unknown) services that work in a cloak of secrecy and whose workings are known only to a select few, which is as it should be.