Butusov on exposure of FSB agent within SSU leadership Censor.NET Editor-in-Chief Yurii Butusov comments on the detention of Dmytro Koziura, Chief of Staff of the SSU (Security Service of Ukraine) Anti-Terrorist Center, who was exposed as an FSB agent. Koziura had been holding positions granting access to top-secret information for over 20 years and maintained extensive contacts within the SSU. 19 660 24