German Foreign Minister Heiko Maas addresses a press statement with German Defence Minister (unseen) on September 2, 2020 at the Foreign Ministry in Berlin. - Foreign Minister Heiko Maas said Germany had called in Russia's ambassador to demand answers on the case of Russian opposition leader Alexei Navalny who was poisoned with a Novichok nerve agent, the same type of chemical used in Britain against ex-double agent Sergei Skripal, dramatically ramping up tensions with Moscow. (Photo by STEFANIE LOOS / various sources / AFP)