panel 42015. at panelists discussing last year for lessons. they will discuss future threats and best practices for the future in combating terrorism. this is live on c-span. [indiscernible] again, we are live this afternoon at the national press club where the potomac institute is set to host a discussion on the global efforts to combat terrorism. the panelists are current and former ambassadors. while we wait for this, we will show you the latest in negotiations with iran on a nuclear deal. this is from this morning s washington journal. host: how close are we to a breakthrough and what needs to be negotiated in the final hours? guest: sure. they were going to shift the agreement from russia. it was a nice symbolic step, if nothing else, for the u.s. and others. look, this deal is going outside of iran. it will increase the breakout time being able to make a nuclear weapon. it cannot be described as a dealbreaker it self. sanctions have been the big sticking poin