Military nanotechnology - how worried should we be?

Most of the countries doesn't invest directly in military nanotechnology, most of them just invest in researches in other areas of nanotechnology such as electronics or materials.
But the USA DoD its investing in nanotechnology for defense, trying as always to be the most advanced country in military equipment.

The problem here its that this could affect the civilians, as we all now use have different military spots around cities and countries, most of the time military test involve explosions, imagine tons of nano particles flying around with this explosion polluting the air, the water and the fields, tons of this nano particles with unknown risks and affections to the human body

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Article By Michael Berger, Copyright 2006 Nanowerk LLC