FILE - Vladimir Kara-Murza, Russian opposition activist, arrives to lay flowers near the place where Russian opposition leader Boris Nemtsov was gunned down, in Moscow, Russia, on Feb. 27, 2021. An imprisoned Russian opposition figure has been transferred to a maximum security prison in Siberia and placed in a tiny “punishment cell," his lawyer said Sunday, Sept. 24, 2023. (AP Photo/Alexander Zemlianichenko, File) FILE PHOTO