RT News - October 22 2020 (17:00 MSK)

Donald Trump and Joe Biden prepare to face off in the final debate before the US election. And there's stricter moderation this time round, with a mute button to prevent interruptions. A volunteer dies in a major Covid-19 vaccine trial casting doubt over the AstraZeneca jab. The conflict between Azerbaijan and Armenia rages on, in spite of two ceasefire deals. Our correspondent is in the disputed Nagorno-Karabakh region.