I believe 'dowsing for bombs' is a reference to http://www.bbc.co.uk/news/uk-22380368 http://www.bbc.co.uk/news/uk-22380368. In which case the perpetrators sold

I believe 'dowsing for bombs' is a reference to http://www.bbc.co.uk/news/uk-22380368 http://www.bbc.co.uk/news/uk-22380368. In which case the perpetrators sold the kits to governments/agencies i.e. third parties were being exposed to the bombs.