The guys should be granted the Nobel Price, for sure.

To be able to create an electrical field strong enough to attract ions over 
a distance of 5000 m from a plane: respect!

Of course - I would not recommend using a device this highly charged near 
any combutible or instable substances, especially when one is doing the 
detecting from a few meters away. I am pretty sure if such a device could be 
built, it would detect explosives from a few meters distance for sure. Once. 
And in a very terminal way.

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