lasers

A "Minority Report" security system that can remotely screen thousands of air passengers for any who are planning a terrorist attack is being developed in the US. The aim of Project Hostile Intent is to find a way of catching would-be terrorists when they are just thinking of committing a crime. A battery of lasers, cameras, eye trackers and microphones would be used to spot tiny changes in facial expression, pulse, perspiration, and gait that give away "current or future hostile intentions".