Owais Crawford
Airport security screening is a crucial process that ensures the safety of passengers, staff, and aircraft by preventing prohibited and dangerous items from entering sterile areas. Screening checkpoints are designed to inspect passengers, their belongings, and cargo to detect potential threats, including weapons, explosives, and other prohibited items. The screening process may vary depending on local regulations and the airport's security measures. Passengers may be screened using metal detectors, millimeter wave scanners, X-ray machines, or pat-downs, while their carry-on luggage and personal items are also examined through X-ray scanning, physical searches, or trace explosive detection. Additionally, airport employees and staff accessing restricted areas are subject to security checks, including background checks and identity verification. These comprehensive security measures are constantly evolving to address emerging threats and maintain the highest levels of transportation security.
| Characteristics | Values |
|---|---|
| Purpose | To prevent prohibited and dangerous items from entering the airport and to ensure passenger safety |
| Who is screened? | Passengers, airport employees, airline staff, and contracted workers accessing restricted areas of the airport |
| What is screened? | Passengers' carry-on baggage, personal belongings, checked baggage, personal electronic devices, cargo and packages |
| Screening methods | Walk-through metal detector, hand-held metal detector, full-body scanner, partial or full pat-down, explosives trace detection, physical search, x-ray system, computed tomography (CT) system, backscatter x-ray, millimeter wave scanners, 3D X-ray technology, bottle scanners, shoe scanners |
| Allowable items | E-cigarettes and vaping devices, lighters, ice skates and rollerblades, disposable razors, undeveloped camera film, sharp objects (knives, box cutters, scissors), firearms, ammunition, sporting equipment, alcohol, self-defense sprays, martial arts weapons, tools |
| Prohibited items | Loose lithium batteries, firearms, ammunition, sporting equipment (baseball bats, golf clubs, ski poles), liquids, aerosols and gels (LAGs) over a certain amount, fireworks, hoverboards, gel candles, realistic replicas of explosives, safety matches, flares, chlorine, liquid bleach |
| Reporting suspicious activity | TSA encourages the traveling public to report unattended bags or packages, individuals in possession of threatening items, and persons trying to enter restricted areas |
| Lost or damaged property | If your property is lost or damaged during the screening process, you may file a claim with TSA |
| Locks | TSA has been provided with universal "master" keys to open certain branded locks. These locks are commercially available, but TSA has no position on their validity as a security measure. |
| Monitoring | Individual airports are responsible for access control and video monitoring of checked baggage facilities. Methods may include CCTV. |
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What You'll Learn
Screening methods: X-ray, metal detectors, pat-downs, etc
Screening methods at airport security are designed to ensure the safety of passengers and staff. Screening procedures are adjusted to meet evolving threats and achieve the highest levels of transportation security. Screening methods vary depending on the airport and the country, but typically include a combination of technology and human intervention.
X-ray machines are commonly used to scan carry-on baggage and personal belongings, including electronic devices. These machines can also be used to detect explosives, alongside trace detection equipment and "puffer machines". Some airports are now experimenting with 3D X-ray technology to enhance security further.
Metal detectors are another standard screening method, with passengers walking through metal detectors and sometimes being scanned with handheld metal detectors. Millimeter wave scanners are also used to screen passengers. In some cases, passengers may be subject to a partial or full pat-down, and police dog services may be used to detect explosives or drugs.
In addition to these methods, some countries have implemented risk-based passenger pre-screening programs that identify potential threats before they arrive at the airport. For example, the Secure Flight program in the United States matches passenger names against trusted traveler lists and watchlists. Similarly, the "Multi Agency Threat and Risk Assessment" (MATRA) initiative in the United Kingdom assesses risks across multiple agencies.
Screening methods also apply to airport employees, who are subject to numerous security checks, including criminal record checks and proof of identity.
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Who is screened: passengers, staff, non-passengers
Screening at airport security is an essential aspect of ensuring the safety of passengers, staff, and non-passengers alike. Here is an overview of who undergoes screening and how the process applies to different individuals in the airport setting.
Passengers:
Passenger screening is a critical component of airport security. Passengers are typically screened through metal detectors, millimeter-wave scanners, or X-ray machines to detect any prohibited items or potential threats. This includes screening their carry-on luggage and personal electronic devices. Some countries, like the United States, have implemented more extensive screening procedures, including additional checks on personal belongings. Passengers may also be subject to random physical searches at pre-board screening points.
Staff:
Airport staff, including employees and aircraft crew, are also subject to security screening. Many airports issue airside passes, which are secure keycards that allow staff to access restricted areas. To obtain an airside pass, employees undergo security checks, including criminal background checks and identity verification. This helps ensure that authorised staff members do not misuse their access. Additionally, the Transportation Security Administration (TSA) in the United States collaborates with intelligence and law enforcement agencies to adapt security procedures based on evolving threats, ensuring the safety of both passengers and staff.
Non-passengers:
Non-passengers, such as individuals meeting arriving friends or relatives, usually need to obtain a gate pass to enter the secure areas of the airport. This requirement has become more stringent since the September 11 terrorist attacks. Non-passengers are often subject to similar security scans as travellers, ensuring that they do not pose any potential threats. In some countries, like Australia, non-travellers are generally not restricted from accessing airside areas, but they still undergo security screening.
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What is screened: carry-on luggage, checked luggage, personal items
Screening at airport security is a vital part of ensuring the safety of passengers and staff. The screening procedures are designed to prevent prohibited items and other threats to transportation security from entering restricted areas. Screening is carried out on carry-on luggage, checked luggage, and personal items.
Carry-on luggage
Carry-on luggage is screened for explosives and other dangerous items. Passengers are required to remove personal electronic devices larger than a cell phone from their carry-on bags for X-ray screening. Powders in carry-on baggage may also require secondary screening, and any powder-like substances over 12 oz. / 350 mL should be placed in checked bags.
Checked luggage
Checked luggage is screened by airport security before being loaded onto the plane. Advanced imaging systems such as X-ray, CT scanners, and Explosive Detection Systems (EDS) are used to look for explosives and prohibited items. If something triggers an alert, a TSA officer may open the bag for a manual check. Passengers are advised to use TSA-approved locks, which can be opened by officers without causing damage to the bag.
Personal items
Passengers may be subjected to biometric checks such as fingerprints or iris scans, as well as walk-through metal detectors and pat-down screening if they are unable or unwilling to remove certain garments. Passengers are also expected to report any unattended bags or suspicious activities.
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Why screen: to prevent prohibited items, threats, and weapons
Screening at airport security is an essential measure to ensure the safety of passengers, crew, and staff. The primary objective is to prevent prohibited items, threats, and weapons from entering the secure areas of an airport and, ultimately, aircraft. This includes detecting dangerous items such as weapons, explosives, and chemicals, as well as prohibited items like loose lithium batteries, e-cigarettes, and realistic replicas of explosives.
Transportation Security Administration (TSA) screeners, or equivalent authorities in other countries, are responsible for conducting these security checks. They employ various methods and technologies to achieve their objectives. This includes the use of metal detectors, walk-through metal detectors, hand-held metal detectors, X-ray systems, computed tomography (CT) systems, explosives detection systems (EDS), and physical searches. Additionally, TSA utilizes millimeter wave machines and backscatter X-ray technology, which employ non-ionizing radiation to detect hidden threats without posing a significant radiation risk to individuals.
The screening process applies to passengers, their carry-on baggage, checked baggage, personal belongings, and even their electronic devices. Certain items are prohibited from being carried on board, such as firearms, ammunition, and sporting equipment, while others may be permitted in checked baggage only, like sharp objects or self-defense sprays. Airport employees, airline staff, and contracted workers accessing restricted areas are also subject to screening, along with their personal items.
The procedures and technologies used in airport security screening are constantly evolving to address emerging threats and maintain the highest levels of transportation security. This includes the implementation of enhanced security measures at airports with direct flights to the United States, as mandated by the U.S. Department of Homeland Security. Additionally, programs like Secure Flight in the U.S. enhance security by identifying potential risks before passengers arrive at the airport.
While the primary focus of airport security screening is to prevent prohibited items and threats, it also plays a crucial role in maintaining public health. Studies have highlighted the need for enhanced sanitation practices, especially concerning frequently touched surfaces like plastic security screening trays. Furthermore, airports have adopted measures such as using plastic utensils and glasses instead of metal and glass to reduce the potential for their use as weapons. These measures demonstrate a comprehensive approach to ensuring the safety and well-being of all individuals passing through airport security.
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Screening technology: millimeter wave, backscatter, 3D X-ray
Screening technologies such as millimeter waves, backscatter, and 3D X-ray are used at airport security to detect potential threats and ensure the safety of passengers and staff. These technologies have been developed to enhance security and address evolving threats to transportation security.
Millimeter-wave scanners are whole-body imaging devices that use electromagnetic radiation to detect objects hidden underneath clothing. They come in two varieties: active and passive. Active scanners direct millimeter waves at the subject and interpret the reflected energy, while passive systems create images using ambient radiation and radiation emitted by the human body or objects. Millimeter-wave technology has been deployed at airports worldwide, including in the US, UK, Amsterdam, Italy, Canada, and Israel. However, they have faced privacy concerns and challenges with reading through sweat or distinguishing folds in clothing, resulting in false positives.
Backscatter X-ray technology is another method used for screening passengers and detecting threats such as weapons or explosives hidden under clothing. These machines use very low-energy X-rays that are reflected back to the scanner. The radiation exposure from backscatter machines is considered very low, equivalent to the amount of cosmic radiation received during two minutes of flight. As of June 1, 2013, backscatter full-body scanners were removed from US airports due to non-compliance with TSA software requirements.
Conventional X-ray scanners produce 2D images that may not effectively detect sophisticated threats. To address this, 3D imaging technology, such as Computed Tomography (CT), has been introduced to provide high-resolution 3D images that enable a more accurate assessment of bag contents. With CT, operators can digitally unpack the bag by zooming in, rotating, and inspecting items of concern. 3D imaging enhances the probability of automatic threat detection and reduces the need for physical inspections, improving the efficiency and experience of the screening process for operators and passengers. However, airports may be hesitant to adopt 3D technology due to the perceived disturbance to existing operations.
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Frequently asked questions
Airport security screening is a process that passengers, airport employees, airline staff, and contracted workers must undergo to ensure that prohibited and dangerous items do not enter the airport.
Airport security screening involves passing through metal detectors or millimeter wave scanners, as well as X-ray machines to check carry-on items and checked luggage. Passengers may also be subject to a partial or full pat-down.
Security screenings at airports are checking for dangerous items such as weapons, chemicals, and liquids that are not allowed as carry-on items. Screening processes also detect items that may be used as weapons, such as sharp objects, knives, and sporting equipment.
If your property is lost or damaged during the screening process, you may file a claim with the relevant airport authority, such as the Transportation Security Administration (TSA) in the United States.
