all of it sparking europe s worst humanitarian crisis this century. more than one million refugeesvd have fled the country, and the u.n. fears more than four million people, about 10% of the ukrainian population, could be displaced in the coming weeks. dozens come to this shelter here in the western city of lviv before leaving the country. that s four-year-old andrey, exhausted after 20 hours of sleepless escape. his father stayed behind in the captured city of kharkiv. now he only has his mom and big brother.ig brother. every day begins with every day begins with a text to our relatives.s. we ask are you we ask are you alive? . diaz: chris livesay joins us from lviv. chris, more than one million ukrainians have already fled the country. can you put that in perspective for us? reporter: well, it is an astounding number on par with iraq and afghanistan. and it s going to get a lot