Men are silhouetted against a video screen with a Twitter logo as he poses with a Samsung S4 smartphone in this photo illustration taken in the central Bosnian town of Zenica

Reuters
Men are silhouetted against a video screen with a Twitter logo as he poses with a Samsung S4 smartphone in this photo illustration taken in the central Bosnian town of Zenica
Men are silhouetted against a video screen with a Twitter logo as he poses with a Samsung smartphone in this photo illustration taken in the central Bosnian town of Zenica, August 14, 2013. REUTERS/Dado Ruvic/Files
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