Iran is expressing frustration at attempts to save the 2015 nuclear deal. It's triggered a mechanism to resolve issues with Britain, France and Germany. The Iranian foreign minister sent a letter to European leaders on Friday - accusing them of not living up to their side of the agreement. Javad Zarif says Tehran has now triggered the dispute mechanism of the agreement six times. The Europeans, Russia and China have been trying to salvage the deal after the U.S. pulled out in 2018 and reimposed sanctions. Since then, Tehran has been rolling back its commitments. But with the U.S. determined to keep isolating Iran, is the agreement still worth saving? Presenter: Imran Khan Guests: Abas Aslani - Senior Research Fellow, Center for Middle East Strategic Studies. Gunter Mulack - Executive Director, German Orient Institute, and a former German Diplomat. Thomas Countryman - Chairman, Arms Control Association in U.S., and a former U.S. Assistant Secretary of State for International Security and Nonproliferation. - Subscribe to our channel: aje.io/AJSubscribe - Follow us on Twitter: twitter.com/AJEnglish - Find us on Facebook: www.facebook.com/aljazeera - Check our website: www.aljazeera.com/ #Iran #AlJazeeraEnglish #InsideStory