TOPSHOT - Refugees from Ukraine gather to take a bus from the border crossing in Medyka to Przemysl, eastern Poland on February 28, 2022. - Overall, more than half a million people have fled Ukraine since its Soviet-era master Moscow launched a full-scale invasion on February 24, with more than half fleeing into neighbouring EU and NATO member Poland, the United Nations said on February 28, 2022. (Photo by Wojtek RADWANSKI / AFP)