So what about the next terror group made up of Western islamic converts or cohorts of the Norwegian gunman or the next Baader-Meinhof gang. Do we wait for them to strike first?
Certainly there is plenty of time wasted and a lot of innocent people maltreated needlessly at airports, not to mention commercial pressures manipulating the 'threat' in the name of security (all the extra drinks sold in post-security shops and on-board aircraft).
What is needed is an independent assessment of risks and suitable methods of security inspection instead of the current mindless bullying of the everyday traveller.