going now to his marianna that we got the gist of what she was saying mariana sanches are joining us from microsoft. saturday marks the third anniversary of brown nuclear deal president all shrunk poll the us out of the agreement in may one in hayworth areas stay for sanctions in november but here are paying leaders are trying to work with iran to save the historic deal that's her lopez her dial explains. that it was a moment many doubted would ever happen the signing of a nuclear deal with the ranch. three years later its survival is very much in question european powers are doing what they can to keep the deal live but the challenges may be too difficult to overcome the iran deal is defective at its core president donald trump denounced the u.s. withdrawal in may describing the deal as one sided under the agreement to run limited its uranium stockpile and nuclear program sanctions were lifted allowing to her on to resume trading oil and gas on the international market. in germany britain france along with russia and china want to make a deal work without the u.s. but talks in vienn