Developments in Ukraine - Sept. 1, 2014

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First-graders attend a festive ceremony to mark the start of another school year in Slovyansk, Ukraine, Sept. 1, 2014.

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Schoolgirls talk during morning assembly in a school in the southern coastal town of Mariupol, Ukraine, Sept. 1, 2014.

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A child looks out of a train window as people who have fled from fighting in the eastern regions of Ukraine arrive at a railway station in Krasnoyarsk, Russia, on their way to a temporary accommodation in local cities and settlements in Siberia, Sept. 1,

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A Ukrainian military helicopter flies above a military base in the eastern Ukrainian town of Kramatorsk, Sept. 1, 2014.