The nuclear agreement, officially known as the Joint Comprehensive Plan of Action (JCPOA), was signed on July 14, 2015, between Iran and six world powers – the United States, United Kingdom, France, Germany, China, and Russia. The agreement aimed to limit Iran`s nuclear program in exchange for sanctions relief.

However, on May 8, 2018, the United States withdrew from the agreement under President Donald Trump`s administration. This move was met with widespread condemnation from other signatories to the agreement, who argued that the JCPOA was a crucial diplomatic achievement in preventing Iran from acquiring nuclear weapons.

Despite the U.S. withdrawal, Iran continued to abide by the agreement, as confirmed by multiple reports from the International Atomic Energy Agency (IAEA). However, in 2019, Iran began to slowly withdraw from some of its commitments under the JCPOA, citing the failure of other signatories to provide sufficient economic relief from the sanctions reinstated by the U.S.

Currently, the future of the JCPOA remains uncertain. President Joe Biden has expressed interest in returning to the agreement, but negotiations have been complicated by preexisting tensions between the U.S. and Iran. In April 2021, talks began in Vienna, Austria, between Iran and the remaining signatories to the JCPOA aimed at restoring the agreement. However, progress has remained slow, with both sides accusing the other of stalling negotiations.

In the meantime, Iran has continued to increase its production of enriched uranium, a key component in the development of nuclear weapons. This has raised concerns among signatories to the JCPOA and the international community, who fear that Iran may be moving closer to developing nuclear weapons capabilities.

In conclusion, the nuclear agreement, also known as the Joint Comprehensive Plan of Action (JCPOA), officially ended when the United States withdrew from it on May 8, 2018. However, the future of the JCPOA remains uncertain as negotiations between Iran and other signatories to the agreement continue. It remains to be seen whether the agreement will be restored and if it will succeed in preventing Iran from acquiring nuclear weapons.