What type of explosives often pose a significant risk to aviation security?

Plastic explosives pose a significant risk to aviation security primarily due to their undetectable nature and versatility. These explosives, made from a combination of a solid explosive material and a plastic binder, can be molded into various shapes and forms, making them easy to conceal. Their composition often enables them to evade traditional detection methods used in airport security, such as X-ray machines.

Moreover, plastic explosives can be found in relatively small quantities that are sufficient to cause significant damage if detonated on an aircraft. This characteristic makes them particularly concerning in the context of aviation security where the consequences of an explosive device on board can be catastrophic.

In addition, these explosives can be activated using various triggering mechanisms, contributing to the potential threat they pose. Their ability to be shaped and their specific chemical properties make them a preferred choice in the construction of devices meant to bypass security measures in aviation settings.