The latest on the Russia–Ukraine crisis: While hundreds of thousands of refugees are leaving Ukraine amid Russia’s attack on the country, some Ukrainian men and women are returning home from across Europe to help defend their homeland. Poland’s Border Guard said Sunday that some 22,000 people have crossed into Ukraine since Thursday, when Russia invaded the country. Members of the group declined to give their names, or only gave their first names, citing their security and that of their families. —- Russian Troops Enter Ukraine’s 2nd Largest City of Kharkiv Street fighting broke out in Ukraine’s second-largest city and Russian troops squeezed strategic ports in the country’s south Sunday, advances that appeared to mark a new phase of Russia’s invasion following a wave of attacks on airfields and fuel facilities elsewhere in the country. The capital, Kyiv, was eerily quiet after huge explosions lit up the morning sky and authorities …