Come on this is Russia not America

How would the CIA be able to operate in Russian soil undetected as if it is their own backyard? Russia is not even a US friendly country, the US do not have a branch in Russia. The FSB is known to be a highly trained security agency. How is it possible for the CIA sneak into the country, drive and somehow import a operation van on their streets, kill people and cleans hotels without being caught and carry guns in a country where gun ownership is tightly controlled if not banned. Come on, this is Russia, the former Soviet Union, it is as laughable as if the Russian FSB could do all that stuff in US soil.