Yatskov collaborated with [[Harry Gold]], who stole industrial formulas from Pennsylvania Sugar Company, and Soviet Union spy-master [[Alexander Feklisov]] in the infiltration of the United States' [[Manhattan Project]] by having Gold liaise with scientist [[Klaus Fuchs]]. | Yatskov collaborated with [[Harry Gold]], who stole industrial formulas from Pennsylvania Sugar Company, and Soviet Union spy-master [[Alexander Feklisov]] in the infiltration of the United States' [[Manhattan Project]] by having Gold liaise with scientist [[Klaus Fuchs]]. |