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An increasing number of migrants fleeing to Europe are children, according to the United Nations. "One in three people arriving to Greece were children as compared to just one in 10 in September 2015," U.N. refugee agency spokeswoman Melissa Fleming told CNN. The number of migrants arriving in Europe is growing in general: More migrants have crossed the wintry ocean to Europe in the first month and a half of 2016 than in the first four months of 2015.