Good security takes a systems-based approach. A system as large and complex as air transport requires strategic calculus that evaluates the impact of a countermeasure across the entire system.

The decision (countermeasure) to ban several kinds of liquids has forced many passengers to check these items. This has lead to a dramatic increase in the amount of checked baggage that needs to be screened. If TSA does not have the capacity to adequately screen these greater numbers of bags, it could very well increase the INsecurity of the overall system and negate the benefits created by original countermeasure.

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