Gennadiy N. Lepeshkin: We know that the most... how to put it, vulnerable, I guess, or most effective products are those which are administered via aerosols. And... aerosols find their way straight to the lungs, and in the lungs begins the... the process begins to occur. That is to say that one aim of biological weapons is to strike effectively; the more rapidly a person receives a certain dose of infection, or an animal which was experimented on, the more... then, it is more effective. And this is why the primary work done was to derive aerosols--to put the product into an aerosol state for use. Many types of animal immunizations are also based on this idea; the vaccine is sprayed in a large, enclosed space, and the animals, cows, let's say, breathe in the vaccine,and mass immunization takes place.