S. Popov: So, when in '83, '84 and '85, the research began to look as if it was being wrapped up, a decision was made to relocate me to another scientific center near Moscow, in Serpukhov. Another scientific institute that was part of Glavmikrobioprom was built near Serpukhov, which worked on bacteria-based biological weapons development. Whereas here... here we studied... in Siberia we had viruses, including the smallpox virus, in Obolensk we worked on issues related to bacterial weapons. However, the principles underlying the design of new types of viruses were very similar to those which I applied in designing new types of bacteria.