saveourcountry,
The first I heard of that sort of thing happening was back in the sixties. Well that's when I heard the story.
During World War Two there was a Japanese scientist that did a lot of work on spreading diseases and other medical experiments. One of the things he was working on when he was captured was a test to see the effects of spreading them airborne. He was captured and when he was interrogated our government thought it sounded interesting. They put him to work for them and he tested a contagion over southern California. You know something contagious enough that it would make people sick but not so much it would kill very many. Those in the most danger were the old or those with a sort of allergy if all went right.
I heard of two such experiments.
I haven't found the story of the experiments I heard about a long time ago. I did come cross a couple of others.
http://www.rense.com/general71/bio.htm
1950 In an experiment to determine how susceptible an American city would be to biological attack, the U.S. Navy sprays a cloud of bacteria from ships over San Francisco. Monitoring devices are situated throughout the city in order to test the extent of infection. Many residents become ill with pneumonia like symptoms.
http://www.itszone.co.uk/zone0/viewtopic.php?t=18604&
Japanese troops dropped cholera and typhoid cultures in water reservoirs, wells and ponds.
Cottony material and feathers coated with anthrax bacteria were used to spread the disease in an airborne manner, as such fibers had been found to be effective in keeping the bacteria alive long enough to reach the intended human victims.
Witnesses recall watching Japanese airplanes dropping a mixture of wheat, millet, soy beans, rice, cotton fibers, paper and fabric cuttings, aerial spraying pathogens over the cities . They all had been coated with the biological organism or with fleas and brought the germs to people.
Japanese distributed infected food, cakes, drink, clothes and children's candies to the locals.
snip...
U.S. itself in 1943 also set up a major Biological Warfare program with 3,500 people at Camp Detrick, now Fort Detrick, in Frederic, MD. Instead of putting the ringleaders on trial, U.S. gave them stipends to gain some advantages in the WMD Biological Weapon.
P.S. The scary part is that no matter how far out many of these stories are they have more of a ring of truth than anything the government tries to sell us on anymore.