Roberta Aguirre
Full-body scanners are devices that detect objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact. They are commonly used in airports, prisons, jails, and other high-security areas to enhance security measures and identify potential security risks. The use of full-body scanners in airports has been a controversial topic, with some people arguing that they are too invasive and violate basic human rights. Despite the controversy, many airports around the world have started to implement full-body scanners as part of their security screening process.
| Characteristics | Values |
|---|---|
| Purpose | Security screening to detect objects on or inside a person's body |
| How it works | Three types of technology are used: millimeter wave, backscatter X-ray, and passive infra-red |
| Deployment | Commonly used in airports, border crossings, prisons, and other high-security areas |
| Privacy concerns | Some people consider full-body scanners to be invasive and a violation of privacy |
| Health concerns | There are mixed findings about the health risks of millimeter wave scanners; X-ray scanners are also associated with health concerns |
| Countries/regions with full-body scanners in airports | US, Canada, UK, India, Australia, Korea |
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What You'll Learn
Full-body scanners in the US
Full-body scanners are devices that detect objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact. They can detect non-metal objects, which became an increasing concern after various airliner bombing attempts in the 2000s. Some scanners can also detect swallowed items or items hidden in body cavities.
In 2007, full-body scanners started supplementing metal detectors at airports and train stations in many countries. Three distinct technologies are used in practice: millimeter-wave scanners, backscatter X-ray scanners, and passive infra-red scanners. Millimeter wave scanners use non-ionizing electromagnetic radiation similar to that used by wireless data transmitters, in the extremely high-frequency (EHF) radio band. The health risks posed by these machines are still being studied, and the evidence is mixed, though millimeter wave scanners do not generate ionizing radiation. Backscatter X-ray scanners use low-dose radiation to detect suspicious metallic and non-metallic objects hidden under clothing or in shoes and body cavities. Passive infra-red scanners collect and analyze natural heat radiation given off by the human body to detect metallic and non-metallic "threat objects", without revealing body details.
In the United States, there are 172 airports with full-body scanners at airport security. These include Houston William P. Hobby Airport, John F. Kennedy International Airport (JFK, New York), Lambert/St. Louis International Airport, Minneapolis/St. Paul International Airport, St. Petersburg-Clearwater International, and T. F. Green International Airport (Warwick, RI, serving Providence).
The use of full-body scanners has been controversial. Critics argue that the imaging produced by the scanners is equivalent to a strip search and violates basic human rights. In the US, opponents have argued that full-body scanners and the new TSA pat-downs are unconstitutional and invasive. Additionally, there are health concerns, especially regarding the use of X-ray scanners, and the safety of backscatter X-ray scanners in particular has sparked debate, leading multiple countries to ban their usage. However, the use of full-body scanners has also been defended as a necessary measure to keep people safe while traveling.
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International airports in the UK using full-body scanners
Full-body scanners are devices that detect objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact. They were introduced in many countries starting in 2007 to supplement metal detectors at airports and train stations.
In the UK, full-body scanners have been in use in some airports since 2010. They were introduced as an anti-terrorism measure after a failed bomb attempt on a transatlantic flight in December 2009. The scanners are currently in place in Heathrow, Manchester, and Birmingham airports. Other UK international airports that are expected to use full-body scanners soon include ABZ, BHD, BRS, CWL, EMA, LTN, NCL, and SOU.
The use of full-body scanners in airports has sparked debates about privacy and human rights. Some people view these scanners as an invasion of privacy and a violation of human rights, particularly when used to capture images of children. In the UK, civil liberties groups have criticised the use of full-body scanners as an infringement of privacy rights. On the other hand, many passengers accept the scanners as a necessary security measure, and the British Department of Transport is working on developing the Interim Code of Practice regarding the use of scanners.
Passengers who refuse a full-body scan in the UK have the option of a full-body pat down in a private room, although some sources claim that this is not the case. Passengers who refuse the scan may be banned from their intended flight, and further strip searches may be conducted if the scanner cannot make a full assessment.
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Airports in Australia with body scanners
Body scanners have been used for security screening at Australian international airports since 2012. They are also being introduced in domestic airports. These scanners are designed to detect all items worn or carried by a person, not just metallic items. This includes weapons, explosives, and other prohibited items, even those concealed under clothing.
In Australia, millimetre-wave technology is used for passenger screening in international gateway airports. This technology does not pose a health risk and uses non-ionising radiation, meaning it does not emit ionising radiation like X-rays. Instead, it uses radiofrequency radiation, similar to that emitted by mobile phones. The scanners collect radio waves emitted or reflected by the body to create a three-dimensional image. This image does not compromise privacy as it is a generic outline of a person with no human anatomy shown.
Some Australian airports with body scanners include Adelaide, Brisbane, Cairns, Darwin, Gold Coast, Melbourne, Perth, and Sydney. Melbourne Airport has confirmed that no individual scans or personal information is stored or transmitted by the scanners. Sydney Airport has recently introduced 3D body scanners in its Qantas domestic terminal (T3), marking the first time many passengers have encountered this technology at a domestic airport.
While body scanners are becoming more common in Australian airports, there has been some resistance. There was public outrage over the nude images collected by the scanners, resulting in a lawsuit in 2010 to stop their use. Additionally, the proposed scanners for Australia have shown a high rate of error in testing. Despite this, the Australian Airports Association estimates the cost of upgrading to body scanners at $2 billion.
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Airports in Canada with body scanners
Full-body scanners are devices that detect objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact. They can detect non-metal objects, as well as swallowed items or items hidden in body cavities. Full-body scanners started supplementing metal detectors in many countries' airports and train stations in 2007.
In Canada, 24 airports currently have full-body scanners in use, specifically using millimeter-wave technology. Millimeter-wave scanners use non-ionizing electromagnetic radiation in the extremely high frequency (EHF) radio band. This technology does not generate ionizing radiation and is considered safe, with the emitted radiofrequency energy being well within Canada's guidelines for safe human exposure. The scanners produce computer-generated "stick figures" to detect anomalies, and passengers can choose between a full-body scan or a physical search.
The Canadian Air Transport Security Authority (CATSA) ordered 44 scanners to be deployed in eight airports across the country in 2010. This increase in full-body scanners was accelerated following the incident onboard Northwest Airlines flight 253 on Christmas Day 2009.
While full-body scanners are used in many airports worldwide, some people have expressed concerns about privacy and the potential health risks posed by the technology. However, millimeter-wave scanners are designed to protect privacy and have negligible health risks, with the radiation dose being much lower than that of a dental x-ray.
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Privacy concerns and the right to refuse
Full-body scanners, also known as Advanced Imaging Technology systems, are used in airports to detect contraband, especially concealed metallic and non-metallic threats, often hidden under clothing. There are two types of full-body scanners: backscatter technology units and millimeter-wave technology units. While both serve the same purpose, their respective radiation emissions vary.
Privacy concerns have been raised regarding the use of full-body scanners in airports, with some civil liberties campaigners referring to the process as "virtual strip-searching". The scanners create an image of the passenger's body without clothing, which is transmitted to a TSA agent seated 50-100 feet away from the scanner. This has led to concerns about the breach of privacy rules under the Human Rights Act. In response to these concerns, guidelines have been established stating that the security officer guiding the passenger through the machine never sees the image, and the employee viewing the scan must be in a separate room, away from the passenger.
Despite these guidelines, some people may still feel uncomfortable with the idea of their naked body being viewed by airport staff. It is a personal decision whether to go through these scanners or not, and if you are concerned about privacy, it is understandable that you may not want to go through them. In the United States, passengers have the option to request a full-body pat-down as an alternative. However, this may not always be available, and it may also feel invasive.
In the United Kingdom, passengers do not have the right to refuse to go through full-body scanners, and there is no option for a pat-down search. This has been confirmed by ministers, despite warnings from the government's Equality and Human Rights Commission that the scanners breach privacy rules.
While privacy concerns are important, it is also crucial to consider the security benefits of full-body scanners. These scanners were introduced in response to terrorist threats, such as the 2009 "Underwear Bomber" incident, to enhance security checks and detect concealed devices. As a result, most airports now utilize these scanners, and avoiding airports with full-body scanners may not be a feasible option.
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Frequently asked questions
As of 2019, 172 airports in the US have full-body scanners. Some of these include ABQ, ABE, AGS, ALB, ATL, and more.
Full-body scanners are used in airports across the world. Eight of Australia's international airports have them, including Adelaide, Brisbane, and Sydney. 24 airports in Canada have them, and they are also present in the UK, India, China, and the Middle East.
Full-body scanners are devices that detect objects on or inside a person's body for security screening purposes. They do not require physical contact or the removal of clothing. There are three types of full-body scanners: millimeter-wave scanners, backscatter X-ray scanners, and passive infrared scanners.
