Transport security focus at London counter-terror fair (Update)
A red line appears on the computer screen as a man with a dummy gun and a fake suicide vest under his jacket demonstrates a body scanner at a counter-terrorism technology fair in London on Tuesday.
Unlike traditional airport security gates, the scanner can be hidden as large numbers of people walk past and uses technology originally developed for the European space programme to monitor the ozone layer.
The invisible barriers were among hundreds of cutting edge gadgets on show at Security and Counter Terror Expo, where transport security provided a key focus following the terror attacks in Brussels last month targeting the city's airport and metro system.
"We've certainly seen more demand for this technology than ever before. Clearly the global security context is accelerating that," said Zak Doffman, chief executive of Digital Barriers, the British company behind the ThruVis scanner being demonstrated.
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