US must explain Afghan anti-terror failure - ex-president Karzai to RT

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. RT LIVE http://rt.com/on-airSubscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaTodayLike us on Facebook http://www.facebook.com/RTnewsFollow us on Twitter http://twitter.com/RT_comFollow us on Instagram http://instagram.com/rtFollow us on Google+ http://plus.google.com/+RTListen to us on Soundcloud: https://soundcloud.com/rttvRT (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.