Working with researchers from Clemson University, CNN has found a Russian troll operation targeting American voters and, for the first time, we have confronted the people on the ground behind it -- and it's not where you might expect. With help from Facebook and Twitter, who had already been investigating some of these accounts and who corroborated our findings - this is a never-before seen look at how Russia is once again trying to influence America's democracy. CNN's Clarissa Ward reports.