Talk:Ministry for State Security (USSR)
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I think the first head of MGB was Vsevolod Merkulov from march 1946 to may 1946, then Viktor Semionovich Abakumov from may 1946 to july 1951, then Sergey Ogolcov from August 1951 to November 1951, and then Semion Denisovich Ignatiyev from november 1951 to march 1953. The same data is on polish lounguage version