kristen: thank you so much for joining us. i will see you bac tonight, several developing stories as we come on the air. the confusion over travel mask mandates. how this played out on planes across the country today. the scenes on board. also, the war in ukraine tonight. russia declaring this new offensive. what the pentagon is saying tonight, and the ukrainians refusing to surrender inside a massive steel plant. the pandemic. tonight, for the first time in two years, passengers across the without wearing masks.o fly - what played out on those flights. the joy from some. the concern from others. and what president biden said today about americans who are flying and whether they should still wear the masks. gio benitez on that tonight. also tonight, russia declaring that new offensive in ukraine is now under way. russian forces dropping bombs on a steel plant in mariupol. about 1,000 civilians reportedly