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How Full-Body Scanners Work – and Fail

24 March 2012 (Original: 2010-11-16) | Source | Permalink | comments: 2
By Hans

Categories: [ Full Body Scanners ]

TSA has been introducing full-body scanners to perform a virtual strip search of air travelers. Although technically travelers have the right to opt out, the TSA discourages this behavior with aggressive and invasive pat-down searches. Initially, TSA denied punitive pat-down searches. Then they acknowledged testing a “more aggressive pat-down technique.” TSA began a more widespread implementation of this tactic at the beginning of November, and TSA agents have reportedly been quite open about that fact that the “enhanced” pat-down searches are specifically aimed to be so offensive as to coerce passengers into the scanners. In a blog post otherwise bluntly supportive of full-body scanning (the title, “Shut Up And Get In The Scanner,” gives a good idea of the tone of the writing), one former TSA screener writes:

It is a terror tactic by TSA to get you to walk through the more thorough body scanner.  I can’t defend TSA on this one.  I have talked to the TSA officers and it is no more effective than the old pat down procedure.  They tested it out with trainers and each other.  It is purely a terror tactic by TSA.

Other bloggers (with sharper tongues and stronger stomachs than I) have exhaustively documented the steaming mass of epic fail that is the TSA’s new policy. The aim of this post is to explain how full-body scanners work – and fail.

There are two kinds of full-body scanners: those based on backscatter X-ray technology and those based on millimeter wave technology.

Article Continues »

Comments

Ppc account manager Hamano Tenhoff is addicted to evil eye beads workout routines and train collecting. Lastly she is is getting most her encouragement from chilling together with her family.

By murano glass pendants on 2012 04 24 - 12:48:27

PLEASE sign the petitions against this disgusting draconian and ILLEGAL mandate - and forward to ALL who you know!

http://www.change.org/petitions/anthony-albanese-stop-rollout-of-cancer-causing-airport-body-scanning-machines-in-australia


http://http://www.gopetition.com/petitions/stop-the-implementation-of-body-scanners-in-australian.html

Only your signature can effect change.

By Biggest Brotherest on 2012 06 06 - 11:32:54

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Recent Comments

Cris,

the point that rational people make is that the stuff coming from the airplane exhaust stays indeed the same, but what’s changing is the situation around the plane. At one day there is dry air, at annother there is a lot of humidity. (See my explanation how the latter can happen when a front is approaching.)

If a contrail persists and grows, the additional mass comes from the humidity that is already present in the air - just like when natural clouds form, seemingly out of nothing.

By the way, that is a well-known plausibility argument against chemtrails - no plane is able to carry the mass equivalent of even a small persistant trail (search “ice budget”).

By Josh on 2014 10 31 - 23:46:16
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

Andrew Adams,

I don’t claim to be an expert. However, I have read a lot about both chemtrail claims and their dissection from a scientic point of view, from sources that are accessible to everyone.

If something specific that I wrote is wrong, I certainly welcome a correction. Usually, I’m giving references from actual experts, so it’s only fair that any rebuttal should include specific references too. Also, I’d welcome if we could stay polite.

The science of persistent contrails is well established. They were observed since the early days of aviation (see also the top article), and the conditions that favour them were researched in the middle of the 20th century (Schmidt and Appleman, see for instance the introduction of this paper).

The Appleman Chart is a rule of thumb for contrail prediction. It is not very intuitive, but there is a visualization available which allows to adjust the parameters and see how the contrail properties are changing (needs Java).

Any claim that a specific persistent contrail cannot be explained with this knowledge needs to be based on very good evidence. If the evidence is reviewed and still stands, science has to be corrected. That’s the whole idea about scientific research - but the burden of proof lies with the person who makes the claim.

By Josh on 2014 10 31 - 22:38:08
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

It amazes me how rational people can think that the same stuff coming out the back of a plane can one day increase to enormous size and exhibit strange transformations(usually when rain is forecast) and other days is either non existent or merely dissipates from visibility within a minute.

By Cris on 2014 10 31 - 21:51:08
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

“i have been neither dictatorial, nor abusive” - yes, you have mate. Earlier you said “how about just taking a big gulp from the mug of STFU”. That is both dictatorial and abusive. We’ll now add “dishonest” to the list of your shortcomings. Have a nice day.

By Hereward Fenton on 2014 10 31 - 21:01:25
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

Moderate Muslims:

http://www.liveleak.com/view?i=253_1412566275

By Eugene Donnini on 2014 10 31 - 20:28:52
From the entry 'A review of violence and intolerance in Islamic and other societies'.

fenton, i didnt say i didnt want to engage in rational debate, i said i wasnt interested in engaging with an obviously mendacious shill. i have been neither dictatorial, nor abusive, and as far as failure to prove anything goes, ignoring evidence does not mean evidence has not been provided, nor proof been established.

you have certainly not proven by any stretch of the imagination, that chemtrails are imaginary, and the concern of thousands of credible experts worldwide is without justification.

may i suggest if you can not prove what you are asserting, that you also take a hearty sip yourself. have a shitty day.

By Andrew Adams on 2014 10 31 - 15:33:15
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

The onus of proof is on those promoting geoengineering (David Keith, etc.Ken Caldera) to prove that what they say about the spraying, i.e. that it is a proposal, not a global reality, is true. That follows from the precautionary principle.

By W, Hall on 2014 10 31 - 15:10:14
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

As admin of this site I feel I need to step in here. Andrew, if you do not not want to engage in discussion and debate that’s fine, however you have absolutely no right to tell anybody to “STFU”.

I have provided a comment section to encourage free discussion and debate. Your dictatorial and abusive tone merely demonstrates your failure to prove anything.

Since you don’t want to engage in rational debate may I suggest that you refrain from posting here?

Have a nice day!

By Hereward Fenton on 2014 10 31 - 14:52:32
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

@ lumpen josh
what part of “I have no interest in hearing anything else you have to say, ” is too hard for you to understand?
I do not have to justify anything to you, i dont have to point you to anything, i dont have to engage you in any sort of conversation here because you have proven yourself to be of no credibility, a nonsensical bore.

nothing you can say can prove that chemtrails are a figment of the imagination of highly qualified credible people worldwide, so how about just taking a big gulp from the mug of STFU and stop pretending you are some sort of authoritive arbiter on anything.

By Andrew Adams on 2014 10 31 - 14:08:25
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

First off i applaud you for seeking facts rather that resorting to slander as i have all too commonly seen among alternate media. On that note i would like to make known some experiments the Australian government was carrying out! My grandfather was an aircraft maintenance technician many years ago. He obsessively tells me of an experiment they carried out where dry ice was shoveled into a modified chute into the clouds. He claimed they were at the aircraft altitude ceiling and the dry ice would cause the clouds to drop their water. He claimed they were wearing oxygen masks to breathe!

By Stephen on 2014 10 29 - 14:39:09
From the entry 'Chemtrails brownshirts renew threats against TNRA'.

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