Russia's president, Vladimir Putin, has signed off a new law which limits the foreign ownership of Russia's mass media to 20 percent. It's not the only recent move designed to exert more control over the information Russians are exposed to. Al Jazeera's Rory Challands reports from Moscow. Subscribe to our channel http://bit.ly/AJSubscribe Follow us on Twitter https://twitter.com/AJEnglish Find us on Facebook https://www.facebook.com/aljazeera Check our website http://www.aljazeera.com/