Ukrainians Return From Abroad To Fight Russian Invasion

Members of the group returning to Ukraine said they were "not afraid" to fight back.

While hundreds of thousands of Ukrainians flee their country, some Ukrainian men and women are returning home from across Europe to help defend their homeland in the face of Russia's invasion.

Poland's Border Guard said Sunday that some 22,000 people have crossed into Ukraine since Thursday, when Russia invaded the country. 

At the checkpoint in Medyka, in southeastern Poland, many stood in a line early Sunday to cross into Ukraine.