President Biden has launched a 90-day investigation into the origins of the virus, following reports which give fresh life to the Wuhan lab-leak hypothesis. Once regarded as a conspiracy theory, the idea is now being taken seriously by both American and British intelligence. So what changed?

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Guests:

- Warren Strobel, national security reporter, Wall Street Journal.

- Tom Whipple, science editor, The Times.

Host: Manveen Rana.

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Why the Wuhan lab leak theory is being taken seriously