President Joe Biden and western allies have pledged new sanctions and humanitarian aid following the invasion of Ukraine - and warned of a 'response in kind' if Russia used chemical weapons.
Mr Biden also announced the US would welcome up to 100,000 Ukrainian refugees — though he said many probably prefer to stay closer to home — and provide an additional 1 billion dollars in food, medicine, water and other supplies.
This came after the western leaders spent Thursday planning the next steps to counter Russia's month-old invasion - and huddling over how they might respond should Mr Putin deploy chemical, biological or even a nuclear weapon.
They met in a trio of emergency summits that had them shuttling across Brussels for back-to-back-to-back meetings of Nato, G7 and the 27-member European Council.
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