The head of the CIA, John Brennan, has held a news conference, seeking to defend his agency in the wake of damning torture revelations. RT's Gayane Chichakyan reports.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.