After the surge of heightened security against an Al Qaeda revenge attack for the U.S. raid that killed Osama bin Laden, what then for his main target-aviation security? Protection of air travelers has evolved into a costly staple of commercial aviation, and it's unlikely to go away. Overlapping layers of security will remain in place; but in the future, noticeable changes in checkpoint processes can be expected, though they will come slowly, say security experts.
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