Showing posts with label whole-body imagers. Show all posts
Showing posts with label whole-body imagers. Show all posts

Wednesday, May 09, 2012

New Underwear Terrorist Bomb II -- What About Those Body Scanners?

In further proof, as if we needed it, of Bill Moyer's axiom that "Reporters are people who are paid to explain things they don't understand," we have the following brilliant assertion in the Wall Street Journal today about the much-typed "new type" of non-metallic terrorist body-bomb that can be concealed in the underwear:

"Investigators are closely scrutinizing the construction of the bomb for clues that would lead to its makers and would also help aviation security experts improve and adjust airport detection systems. Investigators say the bomb contained no metal, meaning would have likely evaded detection by airport screeners."

Hang on there just a minute, Scoop! Ignore how that passage demonstrates the Journal's appalling decline in copy-editing standards under the regime of the odious Rupert Murdoch (you need an "it" after "meaning" in that sentence). Instead, consider: The TSA has spent hundreds of millions of dollars to install these new-fangled "strip search" machines to replace metal-detecting magnetometers at airport checkpoints. You know, the machines the TSA initially called "whole-body imagers," but then changed the name to "advanced imaging technology" when it became apparent that "whole-body" was an infelicitous, if nevertheless accurate, description of what the machines focus on.

The point of these machines, as the Wall Street Journal seems not to recall, is to remove dependence on metal detectors in favor of machines that see through clothing and, supposedly, detect any anomalous item on the body. The old metal detectors, of course, would not detect any non-metallic underwear bomb, which would likely be noticed only by an alert screener wondering why that terrorist-looking person has droopy pants like some baby with a load in its diaper.

So why, exactly, would these invasive whole-body imaging machines not detect whatever mass this latest model of the underwear bomb presented?

By the way, in the New York Post newspaper today there's a breathless headline over an even more half-assed story in which the reporter seems to think that the body-imagers would be thwarted because the they can't detect the chemical properties of a possible explosive. But that has never been the point of the body-imagers, whose sole function is to detect foreign objects on the body or in the clothes, which are shown as mass. The mass could be a stick of chewing gum or a wad of plastic explosives, the machine only knows shape, not chemical makeup.

That story also makes the ludicrous assertion that the only way to insure real security against chemical bombs is to use "bomb sniffing dogs." Absolutely no security expert in the world would depend on bomb-sniffing dogs -- which can be diverted by a ham sandwich (hey, they're dogs!) -- for anything other than an extra backup check on security. They are not a first-line of defense. The New York Post, of course, is another newspaper owned by the odious Mr. Murdoch.

Meanwhile, a little less fluttering around about the "double-agent" aspect of this strange story is required of all news media covering the story. How about a little more focus on the threat and the evident holes in the system posed by "whole body imaging" strip-search machines that seem not to be able to do what their well-paid manufacturers claim they can do?

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Wednesday, July 20, 2011

TSA Upgrades Some Checkpoint Body-Scanners to Eliminate Showing Nekkid Images

The TSA appears to be following through on promises to deal more effectively with well-publicized (and sometimes hysterically publicized) concerns many people have about the "strip search" aspects of those whole-body imagers that the agency has been busily installing at airport checkpoints.

The TSA said today that it is installing major software upgrades on one type of the machines (the ones that use millimeter-wave technology), that will "enhance privacy by eliminating passenger-specific images" that a screener looks at.

Of the whole-body imaging machines now in use at 78 airports, about half use the millimeter wave technology, which works on radio waves. The others are so-called backscatter machines, which use X-ray technology.

The TSA said it's working on developing similar software upgrades for the backscatter machines. But the millimeter-wave machine upgrades have already been tested at the Reagan National, Atlanta and Las Vegas airports, and are being rolled out "in the coming months," the agency says.

How this works, according to the TSA:

Rather than generating a graphic naked-body image of the person being scanned, the machines, once they're upgraded, will detect any anomalous mass or item in a person's clothes or on the body -- as both types of machine do now.

But if nothing is detected on the upgraded machines, an "OK" appears on the monitor screen, with no body image produced at all. If something is detected, the screen shows a generic body outline that indicates the location of the object or objects. As is the case now, that will then require a physical patdown to "resolve the issue."

Eliminating the specific body image of the person being screened eliminates the need, driven by privacy concerns, to have a separate screener examine the images in a remote location and communicate with the screener at the checkpoint about what the image shows. Instead, both passenger and screener alike will see the image on the screen at the checkpoint.

Whole body imaging machines are now being used at checkpoints in 78 airports. Right now, 488 machines are in use at lanes at those airports, and the TSA is rolling more out, with plans to have them eventually entirely replace then old magnetometers at 2,000 total checkpoints in the roughly 450 commercial airports.

The magnetometers detect only metallic objects. While the whole-body imagers don't detect metal, per se, they show any object or mass on the body. They're being put in place basically to enhance the ability to detect not just metallic weapons but also mass that indicates the possibility of concealed non-metallic explosive material.

Here's the TSA's list of the airports where whole-body imaging machines, which the TSA now calls Advanced Imaging Technology (AIT) machines, are being used.

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