Ukraine War Special Report: Biggest Refugee Crisis Since WWII

Europe is undergoing the biggest refugee crisis since World War II as the war in Ukraine rages. Two million have fled the country less than two weeks since Russian President Vladimir Putin ordered the invasion, according to Filippo Grandi, the United Nations High Commissioner for Refugees. Tom Mackenzie reports from Medyka, Poland where temperatures below freezing and a lack of basic supplies are adding to the upheaval.