As we move towards a federal election this fall, many voters will be influenced by what they read online. And much of that is misinformation, distortion and sadly, fake news. Canada is not immune to election interference. In fact, experts say we're already being targeted. CBC's Adrienne Arsenault seeks out those who have been tracking the threat to find out who these manipulators are, what's driving them, and what we can do to make sure we don't fall prey.