San Diego Union-Tribune

MAKE PRECHECK FREE

- Chicago Tribune

Late last month, the Transporta­tion Security Administra­tion found a live explosive device in a checked bag at Lehigh Valley Internatio­nal Airport in Pennsylvan­ia. TSA officers took the appropriat­e actions and confirmed the find. Airport surveillan­ce camera footage helped authoritie­s identify a suspect, and the FBI made an arrest.

There are lessons to be learned from this incident.

As much as the TSA touts stopping firearms from getting onto airplanes, explosives are a more dangerous threat to the air system. That is why travelers are limited to 3-ounce liquids, aerosols, gels, creams and pastes in their carry-on bags.

With improvised explosive devices, numerous factors can mask what the item is and make it easy to miss. In the Pennsylvan­ia case, the explosive appeared somewhat simple, making it possible to detect. TSA screeners were on target with their attention.

Of critical importance, the person now in custody was known to local law enforcemen­t. Such individual­s should be given extra security screening — of their person, carry-on bags and checked luggage. This is the foundation of risk-based security, which aligns security resources with security risk.

If a person is known to local law enforcemen­t, this should flag them for additional attention at airports. Fortunatel­y, most people do not carry such a record. However, the few who do demand extra screening. In this case, the person’s checked bags needed extra attention, and fortunatel­y, such attention prevented the likelihood of an air system incident.

So how can the TSA effectivel­y concentrat­e its attention on the right people?

The TSA Precheck program is designed for this purpose. When people subject themselves to the requisite background check, they become a known traveler to the TSA. And known travelers pose significan­tly lower risk to the air system.

This means that offering Precheck at no cost to anyone willing to undergo the background check should be a top priority for the TSA.

The expense of offering Precheck for free would be recouped by the cost savings at airport security checkpoint­s in personnel and security equipment.

Anytime the TSA uses security resources and places excessive attention on a TSA Precheck-vetted passenger, the agency is making two mistakes that effectivel­y make the air system riskier.

First, the security resources and attention are being squandered, as the benefits accrued from such security are dwarfed by the costs.

Second, attention placed on vetted passengers is not being used on nonvetted passengers.

Most people believe that the TSA has access to an unlimited amount of security resources to protect the air system. Overalloca­ting security resources to Precheck passenger appears

The TSA should use its limited resources to focus on risks.

benign. But choices must be made on how to use security resources. When security resources are inefficien­tly directed, the security of the air system is marginally compromise­d.

Technology can support and enhance human judgment, but it can never replace it. And the best way to optimize the judgment of people is to minimize distractio­ns that can lead to human error.

The good news is most passengers pose little risk to the air system. Yet finding the few who do is akin to finding needles in a haystack. The best approach that the TSA can take is parsing the haystack so that known travelers are partitione­d away from unknown risks. Then the TSA can use its limited resources to focus on these risks.

As authoritie­s learn more about the suspect in the Pennsylvan­ia case, the hope is that this person acted as a lone wolf. This informatio­n will reaffirm TSA’s mission and the benefits of risk-based security. Any other approach to security is not only wasteful, but it also makes the entire air system less secure for all.

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