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politics." i'm john king in washington. thank you for sharing your day with us. air raid sirens rang through the ukrainian night as russia lobs artillery, drones and missiles in every corner of the country. that as the united states delivers a public warning to china, do not dispatch weapons to vladimir putin. plus, the chairwoman of the republican national committee thinks she can get donald trump to put pen to paper and say yes to supporting the party's 2024 nominee, even if it's not him. and new intelligence pushes the energy department to change its view of how the covid pand...

Saying china has always actively supported in origin tracings. they should stop vilifying china and politicizing the issue. that tells you china is done with this. it believes in its view it's answered the questions, no more. from a public health perspective, which is really planning for the next threat, does it matter if it was a lab leak or human transmission from the market? >> it matters because it can inform our steps for the prevention of the next pandemic. but we're not going to know likely, perhaps ever, but certainly not in time for things like h5n1. i think we can take the lessons, w...