The tactics of a Russian troll farm

The indictment of 13 Russians charged with attempting to manipulate American voters using social media shines a fascinating light on a sophisticated, relentless operation to exploit the internet for political gain. Here's how US investigators say the Russians did it. It was 2014, and in a building in St Petersburg, the Russian Internet Research Agency (IRA) was already hard at work building its arsenal to take on US politics.
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