'I try to not cry'- Teen refugee copes with leaving parents in Ukraine_2

CNN's Matt Rivers shares the story of 17-year-old Alla Renska, a Ukrainian teen refugee sent to Budapest, Hungary, by her parents to escape the war. Then, CNN's Kyung Lah visits a public school in Warsaw, Poland, where the Polish teachers and students don't mind crowding into classrooms with Ukrainian children because it's for a "good cause.