Thousands of athletes pass a bridge over the Danube river shortly after the start of the Vienna city marathon, in Vienna, Austria, on Sunday, April 13, 2014. (AP Photo/Ronald Zak)
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Thousands of athletes pass a bridge over the Danube river shortly after the start of the Vienna city marathon, in Vienna, Austria, on Sunday, April 13, 2014. (AP Photo/Ronald Zak)
