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CEO of French company Rollkers holds up the World's First Electronic 'Under Shoe' which allows pedestrians to be automatically propelled along the street at the Unveiled press preview event for the 2015 International Consumer Electronics Show (CES) at the Mandalay Bay Convention Center in Las Vegas, Nevada, USA, 04 January 2015. CES, the world's largest annual consumer technology trade show runs from 06 to 09 January 2015 and is expected to feature 3,500 exhibitors presenting their latest products and services to about 150,000 attendees. (Photo by Michael Nelson/EPA)
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