first of all, mr. moniz, i want to thank you and commend you for your work in negotiating and securing the iran nuclear deal. secondly, my question has to do with your former role as deputy secretary. i was wondering if you could speak to the risk to the electrical grid. i'm sure you are familiar if you could talk a little bit about that and do you feel that hardening our electrical grid to solar events should be a priority? >> guest: let me say more broadly i think hardening the grid if you like i would say,ha making it more resilient against a number of threats, you mentioned solar flares in extreme circumstances. those certainly are an issue. i would like to say that frankly, i would say cyberthreat are probably a greater present danger. but in general, what we need to do is we need to get a much more resilient system. we need to continue the deployment that was started nearly 10 yearse ar ago now in s of much more able sensors, for example, that can detect disturbances, lead to waysur of isolating parts