Windows on the Soul?

Security has been transformed from a necessary annoyance into a major new government and corporate priority, not to say obsession.

Across Europe, uniformed security guards have appeared at the doors of once wide-open office blocks. Companies shopping for their first metal detectors have found themselves at the end of long waiting lists. And high-tech gizmos that three months ago might have appealed only to the truly paranoid now look like sensible precautions. Here are a few of the technologies poised to benefit from the new bull market in fear:

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