team is looking to tap into a new resource, underground drainage water, naturally occurring salts, seleniums make it unif it for human consumption. >> our goal is to take this water and turn it into a productive resource. >> >> desal nation removes salt and minerals from brackish water. it is often very energy jump tensive. here they've built a desal nation plant that works on solar energy. >> we can use the sun to reduce the amount of fuel or electricity. that's very, very important from an overall solution. >> the most prominent feature is this 377-foot long array of mirrors. >> we're using this large mirror to capture the heat. the sun light is right field here. >> mineral oil travels do you know central tube and heated by the sun to 248 degrees. the heat is then piped into evaporators and steam generated. fresh water is condensed from the steam and salt and other minerals removed in the process. >> what percentage of the water is purified? >> we can go to 93% water recovery. >> is 93% a typical amount of recovery? >> no, it's very high. that's what makes this process different from tradi

mistress of selenium. >> thank you, mr. chairman. they give very much for being here -- mr. sicily. i am hopeful that the ongoing negotiations will ultimately result in an agreement that we can get behind and a think as your chairman and our ranking member said, many of us have a lot of questions about the details of a final agreement and in a letter i think we will express to you what some of those concerns are. as i listened to my colleagues today guaranteeing that actors to negotiate agreements are going to behave in a certain way is a typical. we have no guarantee of that. so seems to me what the goal of this agreement should be is to be sure that we set it out so it's difficult for them to violate the agreement, that we make it certain we can detect it if they do and that we have an opportunity to respond. that's the best we can do other than imagining that we can control the decision of lots of other people. with respect to that last to to that lest to that last to the pentagon's defense science board released a report that found the u.s. government mechanisms for detection an