US authorities open probe into SolarWinds' cyber breach

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The US Securities and Exchange Commission (SEC) has begun the inquiry into last December's cyber attack on the IT provider, media reports say. It will ask whether some companies failed to disclose they had been affected. Our technology correspondent Rory Cellan-Jones explains the story. As India offers its free vaccinations to all adults, human rights activist Manjula Pradeep of the Wayve Foundation in Ahmedabad offers an assessment of the country's vaccine rollout so far. And what is it that makes a tweet go viral? Researchers at the University of Cambridge say they've discovered the secret: being rude. We hear more from postgraduate researcher Steve Rathje. Jamie Robertson is joined throughout the programme by Dimuthu Attanayake, journalist and researcher for the LIRNE Asia digital policy think tank, who's in Colombo in Sri Lanka, and by Andy Uhler, reporter for Marketplace in Austin, Texas. (Picture: The SolarWinds Corp. logo. Picture credit: Getty Images.)