Reposting from previous bread
Here is a nice piece on Brins' origins:
>Brin was born in Moscow in the Soviet Union, to Russian Jewish parents, Yevgenia and Mikhail Brin, both graduates of Moscow State University (MSU).[11][12] His father is a mathematics professor at the University of Maryland, and his mother a researcher at NASA's Goddard Space Flight Center.[1][13][14]
>In 1977, after his father returned from a mathematics conference in Warsaw, Poland, Mikhail Brin announced that it was time for the family to emigrate. "We cannot stay here any more", he told his wife and mother. At the conference, he was able to "mingle freely with colleagues from the United States, France, England and Germany and discovered that his intellectual brethren in the West were not 'monsters.'" He added, "I was the only one in the family who decided it was really important to leave."[13]
https://en.wikipedia.org/wiki/Sergey_Brin
as a russian born I can assure you that it wasn't easy to leave the country. Hell it was near impossible.
Forr example, many jewish dissidents spent years in jail before granted a permission to leave the USSR for israel.
>Emigration and any travel abroad were not allowed without an explicit permission from the government. People who were not allowed to leave the country and campaigned for their right to leave in the 1970s were known as "refuseniks". According to the Soviet Criminal Code, a refusal to return from abroad was treason, punishable by imprisonment for a term of 10–15 years, or death with confiscation of property.
https://en.wikipedia.org/wiki/Human_rights_in_the_Soviet_Union#Freedom_of_movement
THAT MEANS 2 POSSIBLE SCENARIOS:
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Brins' family were clown agents that were brought back as part of a spy exchange deal (think THE BRIDGE - where spies were exchanged).
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They were inserted as agents to the US, the question is who were the REALLY working for.
NOTE THAT Q POSTED THIS YESTERDAY (see snip):
https://twitter.com/CIA/status/1034866941587087360
Like Q said "Everything is stated for a reason". This snip could be a hint that "the mathematician" Mikhail Brin (Sergeys' father) was a clown agent. Also note that his family Reached high level positions in the US rather quickly, usually it is a process that takes time, as it is hard for Russians to adjust to the western mentality and English language. It is not uncommon to see physics Phd's work in common jobs, until they get comfortable with the language, and until they have enough connections.