The dire security situation in Afghanistan is a vivid example and consequence of extremism being used as a geopolitical tool by some states, former Afghan President Hamid Karzai told RT in an exclusive interview. br br RT LIVE br Subscribe to RT! br Like us on Facebook Follow us on Twitter Follow us on Instagram Follow us on Google+ Listen to us on Soundcloud: br RT (Russia Today) is a global news network broadcasting from Moscow and Washington studios. RT is the first news channel to break the 1 billion YouTube views benchmark.