http://www.jsonline.com/story/index.aspx?id=482183
MARK JOHNSON
"Ways are sought to read chemical 'signatures'. Even before the disclosure of a terrorist plot involving liquid explosives in carry-on luggage, companies had begun pursuing research on a new generation of airport scanning equipment that would use beams of light, electrons or other methods to peer into luggage seeking the chemical signature of dangerous liquids." [Top Topic]
