ERLIN (AP) — Leading Kremlin critic Alexei Navalny has departed from Germany to return to Russia, where he faces the threat of arrest. Navalny’s flight from Berlin was due to arrive Sunday evening at Moscow’s Vnukovo Airport, where security measures were heightened. Navalny has been recovering in Germany from his poisoning in August with a nerve agent, which he has blamed on the Kremlin. The Kremlin has repeatedly denied a role in the opposition leader’s poisoning. He announced on Wednesday that he would return home on a flight operated by Pobeda, a subsidiary of Russia’s state-controlled airline Aeroflot. Navalny said as he boarded the plane that he was “very happy.”