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A worker drives a Zamboni machine across the ice in the Iceberg Skating Palace at the Sochi 2014 Winter Olympic Park in the Costal Cluster on January 25, 2014 in Sochi, Russia. (Photo by Richard Heathcote/Getty Images)

A worker drives an ice resurfacer machine across the ice in the Iceberg Skating Palace at the Sochi 2014 Winter Olympic Park in the Costal Cluster on January 25, 2014 in Sochi, Russia. (Photo by Richard Heathcote/Getty Images)