"Liquid explosives" refers to dangerous substances that can explode or cause harm when in liquid form. These liquids are highly volatile and can be used as potentially deadly weapons. Full definition
The terrorists intended to use liquid explosives carried onto the aircraft. (travelinsurancereview.net)
«Since this particular alleged terrorist plan to use a type of liquid explosive to attack passenger aircraft become known to us, government security, scientific and technical experts have been working to design measures to defeat it,» said transport secretary Douglas Alexander. (politics.co.uk)
In the U.S. alone, Government Accountability Office investigators snuck bomb components through more than 20 airports and the recent roll - up of a terror plot in the U.K. highlighted the inability of current technologies to detect items such as liquid explosives or their precursors. (scientificamerican.com)