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A ship moves down the ice choked Danube River in Budapest, Hungary, on Feb. 9, 2012.
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Ice floes on the Danube in Budapest, as seen on Feb. 11, 2012.
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Two ships on the banks of the Danube River in Novi Sad, Serbia, on Feb. 11.
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The frozen Danube River on Feb. 11, 2012.
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A wide shot of the frozen river on Feb. 12, 2012.
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Ice covers the Danube River in Vienna, Austria, on Feb. 12, 2012, after days and days of freezing temperatures.