I understand they called it chaff. Do you they think would call it something that would scare the masses. I'm no expert on chaff but do they really spread it for hundreds of square miles? And how about the video jme posted and the German video. Regardless I don't like spreading of anything above my head, I am not living in a warzone and I didn't sign up for the military so they need to go test elsewhere if it is just chaff which I doubt.

http://www.youtube.com/watch?v=Keo9j7n_7Lk&feature=player_embedded