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Opposition leader Alexei Navalny was among those arrested at a Moscow demonstration ahead of Vladimir Putin’s inauguration for a fourth term as Russia's President on Monday.
Also in the programme: The woman who has witnessed hundreds of death row executions in the USA; and NASA launches a robotic mission to probe beneath the surface of Mars.
Picture: Russian police officers detain a protester during an unauthorised anti-Putin rally on May 5, 2018 in Moscow. Credit: Getty Images