FILE – In this Feb. 29, 2020, file photo, Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia. Navalny has been poisoned and hospitalized on Thursday morning, Aug. 20, 2020 his spokeswoman Kira Yarmysh said on Twitter, Navalny felt unwell on a flight back to Moscow from Tomsk, a city in Siberia. (AP Photo/Pavel Golovkin, File)