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A woman from Mirhord, Ukraine reacts after her 12 and 8-year-old sons and her 66-year-old mother have been waiting on the Ukrainian side of the border for four days to cross at the Medyka border crossing in Poland. 500,000+ people have fled Ukraine, UN says. 📷 Visar Kryeziu/AP https://t.co/fzvcijbeFu — PolitiTweet.org