There a smell from the explosives - it's quicker to cover an area for the smell-ee than with a metal detector. ------ "After a few months underground, almost

There a smell from the explosives - it's quicker to cover an area for the smell-ee than with a metal detector. ------ "After a few months underground, almost all landmines leak vapours that betray the presence of explosives." http://www.economist.com/news/technology-quarterly/21603239-clearing-landmines-despite-sophisticated-new-technology-many-explosive-devices-are http://www.economist.com/news/technology-quarterly/21603239-...