Vladimir Putin has displayed a mystery scar on his forehead while attending an event in Moscow. The cut was prominent on the Russian president's brow as he addressed the Future Technologies Forum. He used his speech to boast about Moscow's military might, reportedly claiming at one point that 'the whole world is talking about' the capabilities of Russia's Oreshnik missile systems. But audience members may have been distracted by the noticeable scab on the dictator's bald head. The mark has been visible in pictures and TV appearances since Wednesday, with little attempt made to conceal it. But there is no...