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Gaynor McLaughlin: Quite, but one thing terrorists rely on is planning. They do not just turn up and think, “Today’s a nice day. I’ll attack.” They plan in great detail, and one thing that makes it difficult for them to plan is unpredictability. At the moment, we are very predictable in what we do, because we do the same to everybody at every airport. Introducing flexibility and unpredictability will confuse that planning and improve the overall level of security.