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Hugh Pickens writes writes "The Denver Post Reports that a biologist at Colorado State University has re-engineered plants so that they can detect explosives, air pollution and toxic chemicals, signaling the presence of potentially deadly vapors by turning from green to white. 'If you take something into Denver International Airport, like an explosive for a plane, my plants are going to turn white,' says June Medford, who developed the system. 'That's going to get the security guys on you.' Military and Homeland Security research directors say they envision wide applications for the genetically modified plants positioned in buildings, war zones and cities where terrorists could set up covert bomb-making factories and add that strategic placement of the plants could help reach a goal of deploying a decentralized, nationwide system for detecting explosives. 'Our hope is if these plants could be located ubiquitously, we might be able to detect explosives at the point they are being assembled,' says Doug Bauer, the Homeland Security explosives research program manager. 'You would have a much greater opportunity for first-responders to interdict and disrupt that activity.'"