WUSA 9News Now At 11pm October 22, 2010
>> it was a top secret program. >> reporter: he says, yes, members of the military used biological agents on people in public places without their knowledge. >> they did test at the national airport in washington dc where they had someone walk through the airport with a suitcase which had a stray device. they did the same thing at the pentagon. >> reporter: but he says what they sprayed was safe. >> it was ubiquitous. it's all around us. we live with it every day. >> reporter: the reason was national security. >> this proved that someone could walk through unchallenged with a device ...