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What does Russian President Putin's walk tell neurologists about the man himself? A team of European scientists noticed that Mr Putin has a 'clearly reduced right-sided arm swing'. But is it a leftover from his extensive weapons training at the KGB or a sign of a neurological disease? Professor Bastiaan Bloem from Radboud University Medical Centre tells us of their conclusion. (Picture: Vladimir Putin at a meeting in Georgia; Credit: Getty images)