Air raid sirens rang through the Ukrainian night as Russia lobbed artillery, drones and missiles in every corner of the country. That as the United States delivered a public warning to China: Don't dispatch weapons to Vladimir Putin. 

Plus: The chairwoman of the RNC 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 pandemic began. The agency now believes the virus leaked from a Chinese lab. 

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