Live events at large venues like arenas, stadiums or convention halls – whether they involve wrestlers breaking chairs over each other’s heads, Axl and Slash letting bygones be bygones and reuniting Guns ‘n’ Roses, your favorite NFL team annihilating the opposition 62-3, or a convention involving anything from politics to food to Star Trek – are exciting affairs that channel the camaraderie of the crowd into a powerful collective energy. But they also are vulnerable to threats.

Physical security solutions

Terrorists and other malefactors have known for centuries that any large gathering of people has inherent vulnerabilities on which they can prey: Crowds make it hard for security to keep track of any single person or spot unusual behavior, and the number of people congregated in one space amplifies the impact of any attack.

In recent years, organisers of large events have augmented the security methods they use to protect a venue, using both walk-through metal detectors and hand wands, and deploying K9 and police units to patrol the lines to enter security. But these current methods share a universal flaw: to be caught, evil-doers have to be on the verge of actually entering the venue with hundreds of other people, which means they can still cause a massive amount of destruction.

In a survey conducted by Brivo, 50 percent of business security leaders felt they lack adequate budget and financial resources to invest in physical security solutions.

Augmented security measures

Organisers of large events have augmented the security methods they use to protect a venue, using both walk-through metal detectors and hand wands Security professionals and event organisers are constantly on the verge of finding new methods to implement in order to add an extra layer of security at venues and large facilities. For example, at this year’s Coachella Music Festival in Indio, California, which attracts over 100,000 attendees each year, organisers boosted their security initiatives by adding drones, armed guards, magnetometers and dog patrols.

Unfortunately, large entertainment festivals have been a target for ill-intended individuals. Last year, the 91 Route Festival in Las Vegas, Nevada took the lives of more than 50 people and injured over 500.

In the United Kingdom, 22 people lost their lives to a suicide bomber at an Arianna Grande concert in the Manchester Arena. Yet, concerts aren’t the only place new security initiatives and technology need to be implemented in, but also sports arena and large facilities.

Ferromagnetic detection at a venue’s perimeter detects weapons of mass casualty before terrorists get too close
Metrasens partnered with Villa Park, the football grounds for Aston Villa Football Club in the UK, to conduct a trial using FMDS technology, Proscreen 900, to screen fans

Current screening methods

Conventional walk-through metal detectors are a compromise between effective screening and high throughput, as they successfully detect metal objects, but only can screen about five or six people each minute. They are generally placed 10 to 20 yards from a venue’s front façade, either just outside or just inside, to screen people as they enter the facility. Hand wands are used for anyone that sets off the walk-through detector as a secondary screening method for confirmation.

Many facilities also use observational methods to screen, such as drones, CCTV, security officers or police walking the crowd and looking for suspicious behavior, or explosives-sniffing K9 units patrolling the area.

Security personnel are aware of these pre-security-screening vulnerabilities around the perimeter of the venue

Security method limitations

Each of these methods has intrinsic limitations. Observational security methods are just that – observation-based, not detection-based. They rely much more heavily on human factors that introduce greater degrees of error and chance, and positive visual identification of a suspicious threat requires a relatively close proximity to observe the threat. They’re also slow and laborious.

Walk-through detectors and wands will catch someone trying to enter a facility with a weapon, but by the time they do, it may be too late – a terrorist will already be well within proximity to do a lot of damage. Bad guys don’t need to actually enter the venue; they just need to get close enough to injure or kill a large number of people.

That can happen – and has happened, such as with Manchester Arena bombing in 2017 – right at the security point, where a terrorist will be surrounded by dozens or hundreds of people and 10 to 20 yards away from the critical asset: the interior of the venue.

Security personnel are aware of these pre-security-screening vulnerabilities around the perimeter of the venue. What they haven’t had until recently is a way to screen mass amounts of people for weapons of mass casualty as far away from the critical asset as they can, and as far away from densely populated areas as they can, all while not impeding throughput resulting from the requirement for patrons to divest their possessions.

Expanding security reach with FMDS

The far perimeter of a venue is an ideal place to screen for weapons of mass casualty. Most of the time, a terrorist is trying to get closer to the immediate perimeter of the venue, to inflict the most damage to large groups of people waiting to get in; farther away, event attendees are walking toward the entrance and thus are more dispersed, not standing in clusters or lines. This advance screening is possible using ferromagnetic detection systems (FMDS).

The far perimeter of a venue is an ideal place to screen for weapons of mass casualty
The FMDS systems in the trial, Proscreen 900, were placed outside, where individuals were screened for large weapons before they even entered the football stadium

Metrasens recently partnered with a football stadium in Birmingham, UK to conduct a trial using FMDS technology to screen fans. The trial took place in March at Villa Park, the football grounds for Aston Villa Football Club. The stadium can hold over 42,000 people. The FMDS systems in the trial, Proscreen 900, were placed outside, where individuals were screened for large weapons before they even entered the football stadium, adding an extra layer of security.

FMDS is highly accurate – there is no false alarm rate, because it is programmed to find only what security personnel need to find

In the most basic terms, FMDS uses passive sensors that evaluate disturbances in the earth’s magnetic field made by something magnetic moving through its detection zone. Everything else is invisible to it; it doesn’t see people, clothing, backpacks, purses, etc. Nothing can be used to shield the threat, because FMDS doesn’t detect metallic mass; it detects a magnetic signature, down to a millionth of the earth’s magnetic field.

It is also highly accurate – there is no false alarm rate, because it is programmed to find only what security personnel need to find (e.g., a weapon). Although it is a passive technology, it is more effective and reliable than using observational security methods to screen a perimeter, because the technology will never miss something the way a human would.

Recognising moving magnetic signatures

An important point is that the system only works on moving objects. This makes it immune to environmental conflicts such as rebar that would trip up conventional metal detectors and allowing people to be screened quickly and unobtrusively without stopping to divest their possessions as they walk toward a venue – up to 50 or 60 people a minute. FMDS does not need people to be organised into lines or groups; it simply detects a magnetic signature on anything that passes.

It runs on batteries – there is no need for an electricity source, as with a walk-through detector – and can be placed on just about any form factor (a pole, a stand, etc.). This gives security personnel flexibility when deploying FMDS, allowing them to create a wide perimeter around a venue without worrying about portability or a power source. Screening can be as obvious or as concealed as personnel prefer for a particular situation, based on the form factor they select.

FMDS simply gives the opportunity to add a layer of security where there currently is not an effective solution

All of these combine into a solution that creates a way to close a gap in mass screenings at large events, by expanding the secure perimeter and creating a highly accurate way to detect weapons of mass casualty farther away from a critical asset and large crowds. It does not replace screening for smaller items necessarily, and all large venues should use a layered security solution that also deploys tactics like roving security guards, walk-through metal detectors and hand wands. FMDS simply gives the opportunity to add a layer of security where there currently is not an effective solution.

Effective mass screening solution

Pessimists sometimes muse the world is getting more dangerous with each passing year, and that technology is at least partially responsible for both the breadth and depth of the increasingly creative ways bad guys harm people.

But some technologies also are responsible for helping to fight against those threats and make the world safer, and FMDS is one of those. By providing a foolproof method of detecting weapons of mass casualty before terrorists get too close to an event venue, FMDS gives event security personnel a way to better protect large events, making them less dangerous and keeping people safe.

Images source: Metrasens

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James Viscardi Vice President, Global Security, Metrasens Ltd

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