A million Ukrainians flee after seven days of war

More than a million Ukrainians have now fled their homeland, a week since Russia began its brutal invasion.  Most are crossing the border into neighbouring Poland, a nation with a history of turning refugees away but which, for now, is doing all it can to accommodate them.  Today, ABC reporter Sean Rubinsztein-Dunlop updates us from the Polish border town of Medyka on the unfolding humanitarian crisis.  Featured:  Sean Rubinsztein-Dunlop, ABC correspondent, Medyka, Poland  Sofia Kochmar, Ukrainian journalist and refugee