Worldwide most land mines are military-grade and can be spotted with metal detectors. In Colombia, the FARC and other armed groups crafted low-tech improvised explosive devices (IEDs) from PVC pipes, plastic soda bottles, and other hard-to-detect containers packed with explosives and attached to ...
from Google Alert - metal detectorhttps://www.google.com/url?rct=j&sa=t&url=http://science.sciencemag.org/content/360/6387/371.full&ct=ga&cd=CAIyGjBmN2Y1NDMwZGU1NzA5Mzc6Y29tOmVuOlVT&usg=AFQjCNEFB6Jn6FAcVMz2H0g0qpXRoHLdGA
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