From dogs to drones, humanity has found some really intelligent ways to sniff out bombs before they explode. But what if there were a way to catch illicit explosives even earlier?New sensors being developed and tested by scientists sponsored by the European Union may one day help authorities track down home-made bombs (even drug factories) at their point of inception.The sewer-based sensing system would use electrochemical water- and air-sampling to detect certain chemicals typically used for home-made bombs as they travel through the waste stream in urban areas.Data about the time, positioning, type and concentration of compounds would be sent via sensors to a remote computer in real-time where the intelligence would be analyzed and authorities alerted to a potential threat, helping to cut off the terrorist supply chain."Home-made explosives can be produced from commercially everyday household chemicals," said Hans Onnerud, deputy research director of the Department of Defense and Sec...
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