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(Image credit: stromnessdundee/flickr)
A ship moves down the ice choked Danube River in Budapest, Hungary, on Feb. 9, 2012.
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(Image credit: adambotond/flickr)
Ice floes on the Danube in Budapest, as seen on Feb. 11, 2012.
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(Image credit: Katarina/Flickr)
Two ships on the banks of the Danube River in Novi Sad, Serbia, on Feb. 11.
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(Image credit: Gregor Seidlhofer/Flickr)
The frozen Danube River on Feb. 11, 2012.
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(Image credit: Ognjengol/flickr)
A wide shot of the frozen river on Feb. 12, 2012.
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(Image credit: chris from vienna/flickr)
Ice covers the Danube River in Vienna, Austria, on Feb. 12, 2012, after days and days of freezing temperatures.