CNNW CNN Presents July 22, 2012
during the cold war, the military embarked on a top secret program to test chemical secret program to test chemical and biological weapons but researchers used animals but believe it or not they also used humans. volunteers from the army who had no idea what they were signing up for. well, nearly half a century later, some of these human guinea pigs are emging from the shadows with disturbing stories about what the military did to them then and how they are being treated now. dr. sanjay gupta investigates. >> i joined 18 years of age. the height of the vietnam war and really felt a ...