"ЦЛК" actually is wrong acronym, it should be "ЦПК" - Центр подготовки космонавтов; https://en.wikipedia.org/wiki/Yuri_Gagarin_Cosmonaut_Training_Center (author probably mistook the cyrillic letters П (P) и Л (L).
And the "City of Stars" actually is "Star City" - https://en.wikipedia.org/wiki/Star_City,_Russia .
