to the nuclear nonproliferation treaty -- the language that was in there about acquire some people quibble over, but their commitment to the npt was clear and i misspoke in that regard. >> thank you. i appreciate your comment in response to questions from senator markly and others about keeping a seat at the table through the paris agreement and the general approach that suggests. i believe climate change is a major concern for us in the long term and the short term, and that it's human caused and there are actions we can and should take in response to it as a trained chemist, i respect your training as an engineer, would urge you to be a tttentive to t science because i think it is overwhelming to this point. i do think the jpoa structure, p 5 plus 1 that brought it into force and is enforcing it and the paris climate agreement are two examples of tables where we should have a seat at the table and be advocates and be driving