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Sanctions, of course, and americas backing for ukrainians in terms of security assistance, economic and humanitarian aid. the two also discussing russias escalation of attacks on civilians. now, ukraine needs all the assistance it can get, but president zelenskyy standing firm and insisting on staying here in kyiv, leading his people and his country in this time of war. david? >> all right, ian pannell, thank you. the u.n. tonight warning of a worsening emergency, the mass exodus from ukraine....