Reply #41: this article says they would not have found the crotchbomber's materials

[Shallah Kali]

Are planned airport scanners just a scam?

New technology that Gordon Brown relies on for his response to the Christmas Day bomb attack has been tested – and found wanting
http://www.independent.co.uk/news/uk/home-news/are-planned-airport-scanners-just-a-scam-1856175.html

Since the attack was foiled, body-scanners, using "millimetre-wave" technology and revealing a naked image of a passenger, have been touted as a solution to the problem of detecting explosive devices that are not picked up by traditional metal detectors – such as those containing liquids, chemicals or plastic explosive.

But Ben Wallace, the Conservative MP, who was formerly involved in a project by a leading British defence research firm to develop the scanners for airport use, said trials had shown that such low-density materials went undetected.

Tests by scientists in the team at Qinetiq, which Mr Wallace advised before he became an MP in 2005, showed the millimetre-wave scanners picked up shrapnel and heavy wax and metal, but plastic, chemicals and liquids were missed.

If a material is low density, such as powder, liquid or thin plastic – as well as the passenger's clothing – the millimetre waves pass through and the object is not shown on screen. High- density material such as metal knives, guns and dense plastic such as C4 explosive reflect the millimetre waves and leave an image of the object.

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Last week the US Transportation Security Administration ordered $165m-worth of scanners, using both millimetre and X-ray technology, from L-3 Communications.

Qinetiq had developed a similar millimetre-wave body scanner, but is now developing a sophisticated "stand-off" scanner which does not pose any privacy issues as it does not show a body image. Materials hidden on a body reflect back signals, showing up as a red alert on screen. Kevin Murphy, product manager for physical security at Qinetiq, admitted this SPO system would also not have picked up the Christmas Day bomb, but insisted that it could be used as part of a "layered approach" to security in mass transportation, which would also include monitoring people's behaviour.

Mr Murphy echoed Mr Wallace's doubts over whether the millimetre-wave body scanners being discussed by the Government would have picked up Abdulmutallab's hidden explosive. He said: "It is conjecture whether or not these methods would have seen through clothing. I don't think anyone knows."

LONDON, Sept. 28, 2009
Al Qaeda Bombers Learn from Drug Smugglers
New Technique of Storing Bomb Materials Inside Body Cavity Nearly Kills a Saudi Prince
http://www.cbsnews.com/stories/2009/09/28/eveningnews/main5347847.shtml

To get his bomb into this room, Abdullah Asieri, one of Saudi Arabia's most wanted men, avoided detection by two sets of airport security including metal detectors and palace security. He spent 30 hours in the close company of the prince's own secret service agents - all without anyone suspecting a thing.

How did he do it?

Taking a trick from the narcotics trade - which has long smuggled drugs in body cavities - Asieri had a pound of high explosives, plus a detonator inserted in his rectum.

snip

"This is the nightmare scenario," said Chris Yates, an aviation security consultant.

On a plane at altitude, the effects of such a bomb could be catastrophic. And there is no current security system that could stop it.

"Absolutely nothing other than to require people to strip naked at the airport," said Yates.