Many of the brilliant Russian scientists and engineers came to the United States after the fall of the USSR. I believe many of the Russian Jews took advantage of the United States policy to allow religious refugees from Russia. The large Russian Jewish population in Detroit area as well as in the Midwest is a result of this 'Third wave' immigration of Russian Jews to the United States. Interestingly enough, many of the Russian Jewish migrants to the United State in the 1990s were professionals, skilled laborers; many of whom had engineering, medical backgrounds. Where they experienced Pogroms in the USSR and had to keep secret their Hebrew faith during those times, in the United States, they blossomed. Many Russian-Americans of Jewish faith are a successful community here.