Stock Photo - People walk past a panorama picture from the Willis Tower in Chicago at the special expo section 'Metropolitan Solutions' at the Hannover Messe in Hanover, Germany, 08 April 2013. Around 6,500 companies are taking part in the world's largest industrial fair from 08 until 12 April 2013. Photo: JOCHEN LUEBKE | usage worldwide. - Hanover/Lower Saxony/Germany

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