January 20, 2014: Implementation of the Joint Action Plan begins. The IAEA publishes a report on Iran`s compliance with the agreement. The report states that Iran is complying with the terms of the agreement, including halting uranium enrichment at 20%, beginning the reduction of half of the stockpile of enriched uranium from 20 percent to 3.5 percent, and halting work on the Arak heavy water reactor. The IAEA is also undertaking more intrusive and frequent inspections. The IAEA also publishes a report on its more comprehensive protection measures in Iran. The report notes that agency inspectors visited one of the sites to which Iran granted access under Iran and the August 26 IAEA agreement. According to the report, the second site is expected to be inspected in September. For more information, see: IAEA report shows progress in the investigation. May 27, 2016: The IAEA publishes its quarterly report on iran`s implementation of the nuclear agreement. The report shows that Iran complies with the restrictions imposed by the agreement and that inspectors were able to access certain Iranian websites through free access visits.
Trump ran for president and criticized the deal, and the expectation that the U.S. would pull out of the deal discouraged trade and investment. Trade between the EU and Iran reached more than 20 billion euros a year before the U.S. withdrawal, but many large European companies have moved away from Iranian markets for fear of U.S. sanctions. The JCPOA has ended some of the sanctions against Iran, while others have been suspended subject to exceptions. These include exemptions for oil sanctions introduced in January 2012, which require regular re-certification. In 2017, Trump considered not seeking back and withdrawing from the agreement.  According to Jarrett Blanc of the Obama administration, since the JCPOA is not a treaty but an agreement between several countries, it has no formal provisions for withdrawal, but a member of the agreement could stop fulfilling its obligations.  On August 25, 2015, a group of 53 Christian leaders of different faiths sent a message to Congress inviting them to support the agreement.
 The Christian leaders wrote: “This is a moment to recall the wisdom of Jesus who, in the sermon of the Mountain, said: “Blessed are the artisans of peace, for they will be called children of God” (Matthew 5:9). … There is no doubt that we are better off with this agreement than without it.  The letter was coordinated by a group of Quakers, the Friends Committee on National Legislation.  Among the signatories of this letter was Jim Wallis of Sojourners; John C. Dorhauer, Minister General and President of the United Church of Christ; Shane Claiborne; Adam Estle von Evangelicals for Middle East Understanding; Archbishop Vicken Aykazian of the Armenian Orthodox Church; A. Roy Medley, head of the American Baptist Churches USA; Reverend Paula Clayton Dempsey of the Alliance of Baptists, senior pastor Joel C. Hunter of Northland, A Church Distributed; And Sister Simone Campbell, director of the “Nuns on the Bus” Catholic campaigns.   On 17 August 2015, a group of 75 experts in the control and non-proliferation of nuclear weapons issued a joint statement in favour of the agreement.  “The JCPOA is a strong, long-term and verifiable agreement that will be a clearer one for international nuclear non-proliferation efforts,” and that “the strict restrictions and transparency measures of the JCPOA will make it highly likely that all of Iran`s future efforts to pursue nuclear weapons, even a secret program, will be immediately unveiled, giving the opportunity to do so. resolute intervention to prevent Iran from acquiring a nuclear weapon.”   The letter was organized by the bipartisan Arms Control Association.  Among the 75 signatories were Valérie Plame and Joseph C.