Sachin Walls
Airport security is a complex system of checks and balances designed to ensure the safety of passengers, crew, and aircraft. It involves identifying potential hazards, detecting prohibited items, and maintaining secure environments through various methods, including scanners, behavioural monitoring, and intelligence screening. While metal detectors are commonly used to identify metal objects, they are typically adjusted to ignore small metallic items like buttons or zips on clothing. However, travellers wearing clothing with metal studs or rivets may be subjected to additional screening measures, such as pat-downs. Advanced Imaging Technology (AIT) is also employed to screen outer garments and bulky clothing, and travellers may be asked to remove these items for separate screening. To ensure a smooth security experience, it is advisable to prepare in advance, follow instructions, and cooperate with security personnel.
| Characteristics | Values |
|---|---|
| Purpose | To prevent prohibited items and other threats to transportation security from entering the airport |
| Items screened | Carry-on bags, personal electronic devices, light outer garments, bulky clothing, shoes, liquids, belts, hats, head coverings, jackets, hoodies, cardigans, jumpers, sweatshirts, trousers, luggage |
| Screening methods | Advanced Imaging Technology (AIT), X-ray machines, metal detectors, pat-downs, behavioural monitoring, intelligence screening, backscatter X-ray machines, millimeter wave scanners, cabinet X-ray machines, ATI scanners |
| Items ignored by metal detectors | Very small amounts of metal, such as buttons, zippers, watch, belt buckle, earrings |
| Items detected by scanners | Liquids, metals, rugs, gold, narcotics, drugs, explosives, weapons, objects hidden in socks, shoes, or undergarments |
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What You'll Learn
Drugs
While it is unclear whether drugs can be hidden in buttons without being detected by airport security, several methods are used to smuggle drugs through airports. Airport scanners are designed to detect prohibited items, including illegal drugs, by identifying abnormalities or suspicious items based on density, shape, and material composition.
X-ray scanners, for example, can identify drugs hidden in luggage by detecting objects with different densities and compositions. Drugs, being organic materials, appear differently on X-ray images compared to metal or plastic. Advanced detection technologies, such as the Matrixcope, utilize a combination of X-rays, millimeter waves, and computed tomography (CT) to enhance the detection process by offering clearer, more detailed visuals.
Additionally, millimeter-wave scanners, a type of full-body scanner, can detect drugs hidden on a person's body or clothing by identifying unusual shapes or densities that deviate from the natural contours of the human body. These scanners are becoming increasingly common, with many airports now directing all passengers through them.
Other methods used to detect drugs include drug detection dogs, which provide an extra layer of detection, and chemical testing, where small samples are tested using portable chemical detection kits. Customs officers may also rely on intelligence based on a passenger's flight origin and their recent travel history to identify suspicious behavior.
It is important to note that attempting to smuggle contraband through airport security is illegal and can result in serious consequences.
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Explosives
Airport security systems use metal detectors, millimeter wave scanners, and cabinet x-ray machines to ensure the safety of travelers. These devices can detect items that may be hidden. Metal detectors use magnetic fields to identify metal objects, such as buttons, belt buckles, watches, and small earrings. Millimeter wave machines use non-ionizing radiofrequency waves to detect threats like guns and knives, while X-ray machines are used to screen carry-on items and checked luggage.
TSA screening procedures are designed to prevent prohibited items and threats, such as explosives, from entering secure airport areas. They screen approximately 3.3 million carry-on bags daily for explosives and other dangerous items. Passengers are typically required to remove all items and place them on the X-ray belt for screening.
While metal buttons on clothing are generally ignored by metal detectors, individuals wearing light outer garments or bulky clothing may be asked to remove them for separate screening. This includes items like windbreakers, vests, blazers, and light jackets. If an individual is unwilling to remove their clothing, additional screening may be conducted.
In terms of explosives detection, swab tests are commonly used to check for traces of explosives on electronic devices, clothing, and other items. These tests can produce false positives, as chocolate and certain dense materials can be mistaken for explosives. Millimeter wave scanners are also used to detect hidden threats, and passengers who trigger these scanners may be subjected to a pat-down search for confirmation.
Although small metal buttons are typically undetected by metal detectors, it is theoretically possible to conceal explosives in buttons. These explosives could be detected during baggage screening or through swab tests if traces are present on a passenger's belongings or clothing. Overall, airport security employs multiple measures to detect explosives and ensure the safety of travelers.
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Weapons
While it is unlikely that a weapon could be hidden within a button and successfully smuggled through airport security, there are some weapons that could be concealed in clothing and carried through security without raising suspicion. These include tactical pens, which are allowed in carry-on luggage and can be used for self-defence without arousing suspicion. Similarly, small, high-pitched whistles can be attached to bags and used to deter attackers by alerting others. Reinforced gloves without metal components can boost punching power without setting off metal detectors. An empty aluminium water bottle is another striking tool that can be carried in hand luggage and used for self-defence.
Flashlights with a strobe function can disorientate potential attackers and are TSA-approved, provided they are under 7 inches. Personal alarms, which emit a 130 dB siren to deter threats and alert bystanders, are also allowed.
Firearms are not prohibited in checked baggage, but they must be unloaded and securely boxed or included within a hard-sided case. Ammunition must be transported separately in checked baggage and is not allowed in carry-on baggage. Law enforcement officers (LEOs) flying armed must check in with the airline and submit a National Law Enforcement Telecommunications System (NLETS) message during airport check-in. They must also keep their weapons concealed and out of view at all times.
It is important to note that even if an item is generally permitted, it may be subject to additional screening or not allowed through the checkpoint if it triggers an alarm, appears tampered with, or poses security concerns. The final decision rests with the TSA officer.
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Liquids
Any liquids over 100ml must be packed in checked baggage. However, there are some exemptions to this rule. Liquids over 100ml can be taken through security if they are for essential medical purposes and are accompanied by a prescription or medical note. Liquids purchased at the airport or duty-free liquids bought internationally and taken through security on a connecting flight to the US are also allowed, provided they are sealed in a secure, tamper-evident bag.
Food and powders are also considered liquids and can obstruct X-ray images, so they should be packed in hold luggage to minimise delays. Frozen liquids, such as ice packs, are not permitted in carry-on luggage.
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Electronics
Electronic devices larger than a cell phone must be removed from carry-on luggage and placed in a separate bin for X-ray screening. This includes laptops, tablets, e-readers, handheld gaming consoles, and cameras. These devices can interfere with scanners and block the X-ray view of other items in the bag. Additionally, lithium-ion batteries in electronic devices are highly flammable, so it is important to follow the proper procedures for carrying them.
Some airports have upgraded to 3D X-ray machines or CT scanners, which may not require the removal of electronics from carry-on luggage. However, it is always a good idea to check with the specific airport before traveling. It is recommended to keep electronics in an easily accessible spot in your luggage to facilitate the screening process.
Smartwatches, such as Apple Watches or FitBits, usually do not set off alarms and can be worn through scanners. However, some airports may still ask you to remove them, especially if they are large or resemble other electronic devices. It is important to follow the instructions provided by the airport security staff.
Overall, it is important to be prepared and organized when traveling with electronics to ensure a smooth and efficient screening process at airport security.
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Frequently asked questions
Airport security scanners are looking for unlawful devices, weapons, explosives, narcotics, and other threats to transportation security.
Airports use a variety of security scanners, including metal detectors, backscatter X-ray machines, millimeter wave scanners, and cabinet X-ray machines.
Airport security scanners can detect small metallic items such as buttons. However, they are designed to ignore very small amounts of metal, like buttons on jeans or small earrings. Scanners are also used to detect items hidden in luggage or clothing, such as drugs or other contraband.
