Infogence Incident Brief: Air Freight Bomb Plot
The Incident
On Friday, 29th of October, 2010, two bombs were intercepted by security officials in the UK and Dubai following a tip-off by Saudi authorities. The two devices were posted in the Yemeni capital Sanaa with freight firms UPS and FedEx and were both addressed to Synagogues in Chicago, USA.
It has been confirmed that the device transported by FedEx and intercepted in Dubai had been transported on two passenger jets, first from Yemen to Doha and then on to Dubai on a second plane. The device transported by UPS and seized in the UK also went via Dubai and passed through Cologne in Germany, before being intercepted at East Midlands Airport in the UK.
According to UK Home Secretary Theresa May, “the devices were probably intended to detonate mid air”. The fact that the packages were addressed to historical figures Diego Deza, the 15th century archbishop of Seville, who sadistically interrogated Muslims during the Spanish inquisition, and Reynold Krak, a French knight of the second crusade, who slaughtered Muslim pilgrims, seems to indicate that the packages were not intended to reach their destinations.
Although both devices were discovered on Cargo planes, it is likely that the terrorists aim was to blow up a passenger aircraft. In September, an informant told Saudi intelligence that three dummy devices were to be sent as a “dry run” to see if live bombs could get through. These packages, sent from Yemen and addressed to bookshops in Chicago, were checked, found to contain books and religious pamphlets and allowed to continue to their destination. Terrorists were able to track these packages hour by hour giving them some understanding of the time, method and route of delivery.
It is believed that the same informant provided details of the two real packages to Saudi authorities. One of the consignment numbers was immediately tracked to UPS who traced the parcel to a flight that had already left Cologne, Germany for East Midlands Airport in the UK. Soon after the airport was sealed off and the package was located.
A bomb disposal officer attached to the army unit examined it for explosives, x-raying it and swabbing it with chemicals but could not find any trace of explosives. The news was relayed back to the CIA and Dubai, who told them to look again. This time they were able to find it although it wasn’t until the device had been sent to the Defence Science Laboratory that they were able to establish that it was a viable bomb. Initial inspection of the device in Dubai also fooled a United Arab Emirates’ bomb disposal officer. An insider said “These were probably the most sophisticated devices we’ve come across. The fact that they defeated the expertise of two highly experienced bomb disposal officers is extremely worrying”.
The Devices
Both packages contained devices consisting of Pentaerythritol tetra nitrate (PETN), a colourless and odourless plastic explosive, carefully layered onto the inside walls of printer toner cartridges that were themselves inside laser jet printers. Both IEDs contained circuit boards from mobile phones, with their SIM cards removed and their alarms acting as timers. The phone’s alarm would send an electric current through a thin wire filament, similar to those found in light bulbs. The wire filament was in a plastic medical syringe that contained 5 grams (0.18 oz) of lead azide, a powerful chemical initiator. Once hot, the lead azide would ignite causing the PETN to detonate.
According to Dubai authorities one of the packages also contained a textbook on management, a copy of The Mill on the Floss by George Eliot and various handicrafts, including a pink and purple lidded basket. German Scientists, who have analysed the two devices, said that they contained at least 300g of powerful PETN explosive enough to punch a hole in an aircraft.
The Suspects
Both Mrs. May and the Dubai authorities said the devices bore all the hallmarks of al-Qaeda and its Middle Eastern offshoot al-Qaeda in the Arabian Peninsula (AQAP) – an apparent reference to the group’s previous use of PETN in other attempted attacks.
It is thought that the American born terrorist, Anwar al-Awlaki, is behind this bomb plot and that the devices were made by Ibrahim Hassan Tali al-Asiri, a wanted Saudi militant who is also accused of making the bombs used in a string of high-profile operations by al-Qaeda in the Arabian Peninsula (AQAP) since mid-2009.
The 28-year-old is believed to have built the device his younger brother used in an assassination attempt on Saudi Arabia’s deputy interior minister in August 2009, and the underwear bomb used by Umar Farouk Abdulmutallab who was arrested in December 2009, suspected of attempting to blow up an airliner flying from Amsterdam to Detroit.
The Impact on Cargo Screening
The discovery of these two explosive devices is likely to have a serious impact on the way that Cargo is screened throughout the world. Short term measures have already been implemented in the UK and US where all cargo shipments originating from Yemen and Somalia have been banned from their airspace and Printer Toner Cartridges over 500g have been put on the list of restricted items.
In the long term, it is likely that many countries around the world will implement the requirements that the US introduced in August, 2010 for 100% of cargo loaded onto passenger planes to be screened for explosives. They may even go one step further and stipulate a requirement for all cargo shipments to be screened, whether shipped on passenger or cargo aircraft. This would involve all shipments being broken down and each piece screened using physical search, x-ray screening, explosive trace detection, and decompression chambers. As a result cargo companies would most likely experience severe delays, cargo backlogs and transit time increases.
The Solution
These new security measures are only procedural and do not address the actual detection of threats within Cargo shipments. Banning printer toner cartridges and cargo shipments from Yemen, for example, does not stop a terrorist from concealing an IED in a hairdryer or stereo and sending it from the UK. After all Yemen is not the only country where there is terrorist activity.
The successful detection of threats is also not determined by the amount of screening that is carried out. While increasing the number of shipments screened can help, it becomes a rather fruitless task if the screener is not given the training required to detect a threat within them. An untrained screener will find no threats whether he screens 50% or 100% of cargo shipments.
The first step should be to ban all cargo shipments on passenger aircraft while new security procedures and training are implemented. It is unfair to expect passengers to board a plane with freight that has not been screened to the same levels as they have.
The next step is to increase the quality of x-ray and hand search training provided to screeners.
The trend for terrorists to conceal IEDs within other seemingly non threatening objects makes the screener’s job of detecting them even harder. Therefore they must be given the type of training that allows them to know not only what an IED looks like but also how and in what it can be concealed.
This is why Renful Premier Technologies have created a set of security training products specialised to the Cargo industry.
X-ray Simulator Training
Simfox Net, the x-ray threat image processor and training/testing x-ray simulator, has been developed with a number of features aimed at improving the detection skills of Cargo x-ray screeners.
Containing over 1500 images of containers and items, of which 500 are threats, Simfox Net allows trainers to create their own cargo container images and place them onto the simulator for their screeners to be trained and tested. Simfox Net also comes with a built in IED maker, which allows trainers to build and conceal their own IEDs from 100s of explosive materials, detonators and initiators and ensures that screeners are provided with a constant stream of both new and challenging training and testing material.
Given the difficulty of screening large, dense and often complex cargo containers, Renful have ensured that Simfox Net has the same image resolution and image enhancement functions as the x-ray machine the screener is using on a day to day basis. A manifest can also be created for each container ensuring a seamless progression from the classroom to the real thing.
As screeners need to understand how IEDs are concealed, Simfox Net also allows screeners to review each container that they have been tested on. They are able to isolate each item within the container ensuring they get valuable experience of how IEDs are and can be concealed.
Simfox Net also includes an in depth statistical module which allows trainers to review screener performance and adapt the type of training that is provided. This allows trainers to map out the performance of their screeners and ensures that the correct level of training is being provided to each.


Hand Search Training
Much of the visual explosives detection training provided to screeners at the moment is carried out sporadically using pictures. This is ineffectual and only provides limited visual training that does not hold the attention of security personnel.
While using real explosives would be ideal, obtaining and transporting them is extremely difficult, dangerous and inadvisable and therefore cannot be used to provide a regular and effective training plan.
This means that cargo screeners are often forced to rely on limited knowledge and experience to detect items that could cause widespread devastation.
Renful Premier Technologies offer a range of inert replicas or simulants of explosives, IED components and IEDs that simulate the real thing safely and to an unparalleled degree.
These are available in specially created training kits that concentrate on different types of explosives and contain detailed education material that can be used during training.
Individual explosive and IED components that maintain the correct texture, colour, geometrical pattern, density and CT number of real explosives are also available and can be used for the self preparation of IEDs for security drills and the calibration of x-ray machines.
Actionable Intelligence
Terrorism is a continually evolving threat which in order to prevent its devastating consequences requires training that itself is flexible and can be quickly updated.
Infogence Intelligence Reports provide actionable terrorism intelligence by infiltrating closed online terrorist forums and message boards, gathering the relevant information and presenting it as a monthly report featuring analysis, discussions and videos.
They provide the type of information that is invaluable to screeners; opening their eyes to the possibilities of the different types of threats, concealments and methods of delivery that terrorists have used and are currently experimenting with.
In addition to the reports, Renful also develop inert replicas of the IEDs discussed in the report and now have an extensive library of these drill items from which to choose from. These inert IEDs can be used as part of security drills as well as hand search training.
For more information on any of our products or to arrange a presentation contact Renful on +44 (0) 20 8457 9111 or email us at info@renful.co.uk