Trump impeachment: US senator moves to block witnesses

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Democrats in the US have been dealt a major blow in their desire to call witnesses at President Trump's impeachment trial. One of the few wavering Senators decides to vote against the measure. Australia joins the list of countries which will quarantine citizens returning from the epicentre of the respiratory virus outbreak, Wuhan. We go to Niger, where Islamist militancy has been threatening many - including refugees from neighbouring Mali.