You have to have as many defences in place as you possibly can. But even then of course - and it's important to stress this - you cannot guarantee being able to prevent every attack or every kind of attack.
William HagueHow long do Syrian families have to live in fear that their children will be killed or tortured, before the Security Council will act? How many people need to die before the consciences of world capitals are stirred?
William HagueVery few conflicts in the history of the world have been satisfactorily concluded according to a published timetable, because you lose all flexibility in dealing with your opponents.
William Hague