A KGB manual showed how valuable—and how treacherous—Russian émigrés could be. Did KGB veteran Vladimir Putin learn those lessons?
https://www.thedailybeast.com/the-kgb-playbook-for-turning-russians-worldwide-into-agents
https://www.radiosvoboda.org/a/28945900.html
https://www.inopressa.ru/article/29Dec2017/dailybeast/kgb.html
https://theins.ru/politika/86416
https://ru.krymr.com/a/28944363.html
https://lb.ua/news/2017/12/28/386015_putinmirotvorets_opasnee.html
https://ru.krymr.com/a/28941690.html
https://www.kommersant.ru/doc/3508478