FILE - Russia's Leonid Volkov, Chief of staff for the 2018 presidential election for Alexei Navalny's campaign, looks on, at the European Parliament in Strasbourg, eastern France, Wednesday, Dec.15, 2021. Most Russian opposition figures are currently either in prison or in exile abroad. Still, many persist in challenging the Russian authorities, including by speaking out from behind bars. (AP Photo/Jean-Francois Badias, File)