1989 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1989 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1989 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1989 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1989 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1988 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1987 Event U.S.S.R. resumes nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1985 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1985 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1985 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1985 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. #3931 Batten, #4529 Webern, #4530 Smoluchowski, #4818 Elgar, #5502 Brashear and #5943 Lovi 1984 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1983 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1982 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1982 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1982 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1982 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1982 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1982 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1981 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1980 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1980 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1980 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1980 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1980 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1980 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1980 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1979 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1978 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1977 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1977 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1977 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1977 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1977 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1976 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1975 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1975 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1975 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1975 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1975 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1975 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1974 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1973 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1973 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1973 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1972 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1971 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1970 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1970 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1970 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1970 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1970 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1970 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1970 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1969 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1968 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1968 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1968 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1968 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1968 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1968 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1968 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1967 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1966 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1966 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1966 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1966 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1966 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1966 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1965 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1965 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1965 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1965 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1965 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1965 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1964 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1964 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1964 Event U.S.S.R. performs nuclear Test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1964 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1962 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1961 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1961 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1961 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1961 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1961 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1957 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1955 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R. 1955 Event U.S.S.R. performs nuclear test at Semipalitinsk, Eastern Kazakhstan U.S.S.R.
