Facebook and Twitter block Trump

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Social giants act after the President praises supporters who broke into the US Congress building. Plus, how Singapore’s Covid-19 contact tracing data may be accessed by police despite earlier assurances it would only be used to control the pandemic. And we look ahead to next week’s CES, the biggest annual tech event. Can it deliver in a virtual format? Presented by Rory Cellan-Jones, with BBC senior tech reporter Jane Wakefield. Produced by Jat Gill. (Image: Donald Trump rallies supporters to march on the US Capitol to protest against the certification of the election result. Credit: Getty Images).