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Originally published Wednesday, July 20, 2011 at 12:38 PM

New airport software to end naked scanner images

Those blurry but revealing airport body scanner images that caused a public uproar last year are being replaced by a gray, cookie-cutter image of the human form.

The Washington Post

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WASHINGTON — Those blurry but revealing airport body scanner images that caused a public uproar last year are being replaced by a gray, cookie-cutter image of the human form.

After six months of testing at three airports, in Las Vegas, Atlanta, and Washington, D.C., the Transportation Security Administration (TSA) said Wednesday that the new software would be installed on 241 units at 41 airports that use millimeter wave technology.

Software for an equal number of units that use backscatter technology is still being developed, the TSA said. Both work by bouncing X-rays or radio waves off skin or concealed objects.

Instead of the original full-body images, the new software being installed on millimeter wave machines shows a silhouette of the person being scanned on a screen about the size of a laptop computer that is attached to the scanning booth.

If a passenger is cleared by the scan, the screen flashes green with an "OK." If suspicious items are detected, they appear as little boxes outlined in red, showing their location on generic front and back silhouettes on the screen.

Passengers who trigger an alert, and anyone who refuses to go through the scanners, will receive the rigorous frisking that has drawn sharp objections.

"This software upgrade enables us to continue providing a high level of security through advanced imaging technology screening, while improving the passenger experience at checkpoints," TSA Administrator John Pistole said.

Use of the scanners last year infuriated a vocal minority of Americans who pressured the Obama administration and Congress to find a less-intrusive method for trying to ensure air safety. Pistole insisted the scanners are necessary in the defense against inventive terrorists obsessed with attacking aviation.

Another furor arose over the rigorous pat-downs performed on those who refused to go through the scanners or who appeared to be carrying contraband. A California man became the face of the opposition after he threatened a San Diego TSA agent with arrest if "you touch my junk" during a pat-down.

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