The world's biggest country is about to begin voting in parliamentary elections that could weaken the position of Prime Minister Vladimir Putin.<br /><br />Opinion polls suggest his United Russia Party is likely to lose some of its huge majority, but government critique is limited on state-run television. <br /><br />As an alternative, the web has exploded with satirical news and cartoons offering different views about the country's leaders.<br /><br />Neave Barker reports from Moscow.