Ukraine president discussed security challenges, energy with Poland's Duda - tweet
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Market, Omicron risks pose new challenge for Fed policy pivot
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U.S. imposes sanctions on Ukrainians related to 'Russian harmful foreign activities'
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Dozens of firms to make cheap version of Merck COVID pill for poorer nations
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Olympics-'Some people may not make it': athletes risk failing Beijing COVID-19 tests - IOC expert
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Shelling kills four people in Syria's Afrin
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U.S. will work in lockstep with Ukraine if Russia invades -White House
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Car bomb in eastern Colombia conflict area kills one
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Canada agency says Russian-backed actors targeting infrastructure
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U.S. will keep probing diplomats' health incidents -Blinken
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