The World - News from June 12, 1989
Two new security systems capable of detecting plastic explosives were displayed at the Paris Air Show. Thermedics Inc. of Woburn, Mass., displayed a device called EGIS, a computerized chemical analyzer that detects vapors emitted by plastic explosives. A second device, by Science International Applications Corp. of Santa Clara, Calif., showers baggage with neutrons that react when exposed to nitrogen, the chemical emitted by virtually all explosives. The reaction produces a scattering of gamma rays that are analyzed by a computer.
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