Is it true that random scanning at Airports require passenger to be half naked? [closed]

I know, the question might sounds very controversial, but i often heard rumours about horrible experience in some airports

Major airports in US (most of the stories)
Airport in Japan (Highly questionable)
Airport in Europe (Highly questionable).

It is said that random passenger require to strip their clothes down. Is this story true? Have you ever seen or experienced this ?

If yes, is it performed in a concealed room or right in the middle of the crowds (where everybody can see)?

I find it hard to believe this story since major airport is equipped with X-Ray scanner and further patting down scenario (by hand) is sometimes performed to assessed random passenger for possible threat.

Quoting from: http://www.civilrightsmovement.co.uk/consequences-for-refusing-full-airport-body-scan.html

Extra Security Measures taken at Airports Undergoing a full body scan at airports may not actually be the end of the airport security checks. If for some reason the scanner cannot make a full assessment of the passenger then a strip search may be necessary. Passengers will then be required to enter a private area where they will be asked to explain any abnormalities. If security officials are still not satisfied the passenger may be required to remove layers of clothing until the security officials are satisfied. Passengers do have the right for a body search to be made by members of the same sex.

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Can airport scanners see inside your body?

Scanners can detect steel and non-metallic objects on the exterior of the body. Contrary to popular belief they cannot see inside body cavities or diagnose disease. New ATI scanners have been designed to provide passengers with more privacy by showing only a generic outline, which cannot indicate gender or body type.

What does TSA look for when scanning?

Depending on the type of machine, ionizing radiation is used to identify objects that may be hidden by passengers and to create images of what is in luggage. Backscatter passenger scanners are used to detect threats such as weapons or explosives that a person could be carrying under their clothing.

Do drugs show up on airport scanners?

Do airport scanners detect drugs? Technically, modern Millimeter-Wave and Backscatter airport security scanners do not detect drugs. However, they make them very easy to spot, and the chances of someone getting caught depends entirely on how attentive the airport security crew is.

Can you refuse to go through body scanner?

In fact, the TSA does allow you to \u201copt out\u201d of going through the full-body scanner machines. All you have to do is inform the TSA agent at the checkpoint that you would like to opt out, at which point you will be welcomed into the departure area with a wave and a smile.

The Science of Airport Security

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Karolina Grabowska, Tobi, Andrea Piacquadio, Karolina Grabowska