arab allies and certainly in parts of the u.s. congress. an iranian official said this is an historic day, a good day for world peace. chris? >> thank you very much. words only as good as deeds, so what do we see in these 100 pages? right now, unreleased. so as we have been doing, we are giving you the reporting around it. as we know, it comes down to what the covenants are. what happens if what is supposed to be followed isn't. let's get information from nicholas burns. he was the chief negotiator until 2008. ambassador, good to have you. start off at 30,000 feet. the idea a deal got done at all, how meaningful? >> very meaningful for historic. this has been ten years in the making. ten years since the united states under the bush administration decided to