Nuclear program of Iran in the context of Joint Comprehensive Plan of Action

The National Security Agency (NSA) is an intelligence agency of the United States Department of Defense, under the authority of the director of national intelligence (DNI). The NSA is responsible for global monitoring, collection, and processing of information and data for global intelligence and counterintelligence purposes, specializing in a discipline known as signals intelligence (SIGINT). The NSA is also tasked with the protection of U.S. communications networks and information systems. The NSA relies on a variety of measures to accomplish its mission, the majority of which are clandestine. The NSA has roughly 32,000 employees.

Originating as a unit to decipher coded communications in World War II, it was officially formed as the NSA by President Harry S. Truman in 1952. Between then and the end of the Cold War, it became the largest of the U.S. intelligence organizations in terms of personnel and budget. Still, information available as of 2013 indicates that the Central Intelligence Agency (CIA) pulled ahead in this regard, with a budget of $14.7 billion. The NSA currently conducts worldwide mass data collection and has been known to physically bug electronic systems as one method to this end. The NSA is also alleged to have been behind such attack software as Stuxnet, which severely damaged Iran's nuclear program. The NSA, alongside the CIA, maintains a physical presence in many countries across the globe; the CIA/NSA joint Special Collection Service (a highly classified intelligence team) inserts eavesdropping devices in high-value targets (such as presidential palaces or embassies). SCS collection tactics allegedly encompass "close surveillance, burglary, wiretapping, [and] breaking".

Stuxnet is a malicious computer worm first uncovered on 17 June 2010 and thought to have been in development since at least 2005. Stuxnet targets supervisory control and data acquisition (SCADA) systems and is believed to be responsible for causing substantial damage to the Iran nuclear program after it was first installed on a computer at the Natanz Nuclear Facility in 2009. Although neither the United States nor Israel has openly admitted responsibility, multiple independent news organizations claim Stuxnet to be a cyberweapon built jointly by the two countries in a collaborative effort known as Operation Olympic Games. The program, started during the Bush administration, was rapidly expanded within the first months of Barack Obama's presidency.

Stuxnet specifically targets programmable logic controllers (PLCs), which allow the automation of electromechanical processes such as those used to control machinery and industrial processes including gas centrifuges for separating nuclear material. Exploiting four zero-day flaws in the systems, Stuxnet functions by targeting machines using the Microsoft Windows operating system and networks, then seeking out Siemens Step7 software. Stuxnet reportedly compromised Iranian PLCs, collecting information on industrial systems and causing the fast-spinning centrifuges to tear themselves apart. Stuxnet's design and architecture are not domain-specific and it could be tailored as a platform for attacking modern SCADA and PLC systems (e.g., in factory assembly lines or power plants), most of which are in Europe, Japan and the United States. Stuxnet reportedly destroyed almost one-fifth of Iran's nuclear centrifuges. Targeting industrial control systems, the worm infected over 200,000 computers and caused 1,000 machines to physically degrade.

From the mid-1980s to September 2003, the inflation-adjusted price of a barrel of crude oil on NYMEX was generally under US$25/barrel in 2008 dollars. During 2003, the price rose above $30, reached $60 by 11 August 2005, and peaked at $147.30 in July 2008. Commentators attributed these price increases to multiple factors, including Middle East tension, soaring demand from China, the falling value of the U.S. dollar, reports showing a decline in petroleum reserves, worries over peak oil, and financial speculation.

For a time, geopolitical events and natural disasters had strong short-term effects on oil prices, such as North Korean missile tests, the 2006 conflict between Israel and Lebanon, worries over Iranian nuclear plans in 2006, Hurricane Katrina, and various other factors. By 2008, such pressures appeared to have an insignificant impact on oil prices given the onset of the global recession. The recession caused demand for energy to shrink in late 2008, with oil prices collapsing from the July 2008 high of $147 to a December 2008 low of $32. However, it has been disputed that the laws of supply and demand of oil could have been responsible for an almost 80% drop in the oil price within a six-month period. Oil prices stabilized by August 2009 and generally remained in a broad trading range between $70 and $120 through November 2014, before returning to 2003 pre-crisis levels by early 2016, as US production increased dramatically. The United States went on to become the largest oil producer by 2018.

The Joint Comprehensive Plan of Action (JCPOA; Persian: برنامه جامع اقدام مشترک, romanized: barnāmeye jāme'e eqdāme moshtarak (برجام, BARJAM)), also known as the Iran nuclear deal or Iran deal, was an agreement to limit the Iranian nuclear program in return for sanctions relief and other provisions. The agreement was finalized in Vienna on 14 July 2015, between Iran and the P5+1 (the five permanent members of the United Nations Security Council (UNSC)—China, France, Russia, the U.K., U.S.—plus Germany) together with the European Union.

Formal negotiations began with the adoption of the Joint Plan of Action, an interim agreement signed between Iran and the P5+1 countries in November 2013. Iran and the P5+1 countries engaged in negotiations for the following 20 months and, in April 2015, agreed on an Iran nuclear deal framework, which later led to JCPOA, along with a Roadmap Agreement between Iran and the International Atomic Energy Agency (IAEA).

The Iran–Israel war (13 June – 24 June 2025), also known as the Twelve-Day War, was an armed conflict in the Middle East. The war began when Israel bombed military and nuclear facilities in Iran in a surprise attack, assassinating prominent military leaders, nuclear scientists, and politicians, killing civilians, and damaging or destroying air defenses. Iran retaliated with over 550 ballistic missiles and over 1,000 suicide drones, hitting civilian population centers, one hospital and at least twelve military, energy, and government sites. The United States intercepted Iranian attacks, and bombed three Iranian nuclear sites on 22 June. Iran retaliated by firing missiles at a US base in Qatar. On 24 June, Israel and Iran agreed to a ceasefire under US pressure.

The war followed a decades-long proxy war. Iran has called for Israel's destruction, and armed Hamas in Gaza and Hezbollah in Lebanon. Following the October 7 attacks in 2023, both entered open conflict with Israel. In April 2024, Israel bombed Iran's consulate in Damascus, Syria, killing senior Iranian military officials. Direct conflict continued in April and October. Iran's nuclear program has caused international concern for over a decade. Israel considers it an existential threat. In 2015, under the Joint Comprehensive Plan of Action (JCPOA), six countries lifted sanctions on Iran, which froze its nuclear program. In 2018, US president Donald Trump unilaterally withdrew from the plan. Iran began stockpiling enriched uranium and largely suspended International Atomic Energy Agency (IAEA) monitoring. The day before Israel attacked, the IAEA declared Iran non-compliant with its nuclear obligations in a resolution put forward by the United States, United Kingdom, France, and Germany.

The Natanz Nuclear Facility (Persian: تأسیسات هسته‌ای نطنز), officially the Shahid Ahmadi Roshan Nuclear Facilities (Persian: تأسیسات هسته‌ای شهید احمدی روشن), is one of the nuclear facilities in Iran, which was built near Natanz for uranium enrichment. This center is part of Iran's nuclear program. The underground enrichment facility of this center is protected by a concrete shield with a thickness of approximately 7.6 m (25 ft).

According to the Iranian authorities, the gas centrifuges in this center were built 40–50 metres (130–160 ft) underground, for safety reasons. and also for being safe from "possible air attack".

Operation Olympic Games was an unacknowledged campaign of sabotage by means of cyber disruption, directed at Iranian nuclear facilities by the United States and Israel. As reported, it is one of the first known uses of offensive cyber weapons. Started under the administration of George W. Bush in 2006, Olympic Games was accelerated under President Obama, who heeded Bush's advice to continue cyber attacks on the Iranian nuclear facility at Natanz. Bush believed that the strategy was the only way to prevent an Israeli conventional strike on Iranian nuclear facilities. The operation produced a sophisticated computer virus known as Stuxnet, which was designed to disrupt Iran’s uranium enrichment efforts.

The United States announced its withdrawal from the Joint Comprehensive Plan of Action (JCPOA), also known as the "Iran nuclear deal" or the "Iran deal", on May 8, 2018. The JCPOA is an agreement on Iran's nuclear program reached in July 2015 by Iran and the P5+1 (the five permanent members of the United Nations Security Council—China, France, Russia, United Kingdom, United States—plus Germany) also called E3/EU+3.

In a joint statement responding to the U.S. withdrawal, the leaders of France, Germany and the United Kingdom stated that the United Nations Security Council resolution endorsing the nuclear deal remained the "binding international legal framework for the resolution of the dispute".

United Against Nuclear Iran (UANI) is a bipartisan, non-profit advocacy organization based in the United States. Its stated objective is to "prevent Iran from fulfilling its ambition to become a regional super-power possessing nuclear weapons." Along with other advocacy campaigns, the organization leads efforts to pressure companies to stop doing business with Iran as a means to halt the Iranian government's nuclear program and its alleged development of nuclear weapons.

The Islamic Revolutionary Guard Corps (IRGC), also known as the Iranian Revolutionary Guards, is a multi-service primary branch of the Iranian Armed Forces. It was officially established by Ruhollah Khomeini as a military branch in May 1979 in the aftermath of the Iranian Revolution. Whereas the Iranian Army protects the country's sovereignty in a traditional capacity, the IRGC's constitutional mandate is to ensure the integrity of the Islamic Republic. Most interpretations of this mandate assert that it entrusts the IRGC with preventing foreign interference in Iran, thwarting coups by the traditional military, and crushing "deviant movements" that harm the ideological legacy of the Islamic Revolution.

As of 2024, the IRGC had approximately 125,000 total personnel. The IRGC Navy is now Iran's primary force exercising operational control over the Persian Gulf, serving as a de facto coast guard. The IRGC's Basij, a paramilitary volunteer militia, has a further approximately 90,000 active personnel. It operates a media arm, known as "Sepah News" within Iran. On 16 March 2022, it adopted a new independent branch called the "Command for the Protection and Security of Nuclear Centres" involved with Iran's nuclear program. Currently, the IRGC is designated as a terrorist organization by Australia, Bahrain, Canada, Ecuador, Paraguay, Saudi Arabia, Sweden and the United States.

United States foreign policy in the Middle East has its roots in the early 19th-century Tripolitan War that occurred shortly after the 1776 establishment of the United States as an independent sovereign state, but became much more expansive in the aftermath of World War II. With the goal of preventing the Soviet Union from gaining influence in the region during the Cold War, American foreign policy saw the deliverance of extensive support in various forms to anti-communist and anti-Soviet regimes; among the top priorities for the U.S. with regard to this goal was its support for the State of Israel against its Soviet-backed neighbouring Arab countries during the peak of the Arab–Israeli conflict. The U.S. also came to replace the United Kingdom as the main security patron for Saudi Arabia as well as the other Arab states of the Persian Gulf in the 1960s and 1970s in order to ensure, among other goals, a stable flow of oil from the Persian Gulf. As of 2023, the U.S. has diplomatic relations with every country in the Middle East except for Iran, with whom relations were severed after the 1979 Islamic Revolution.

American influence in the Greater Middle East has reduced in recent years, most significantly since the Arab Spring, yet is still substantial. Currently stated priorities of the U.S. government in the Middle East include resolving the Israeli–Palestinian conflict and limiting the spread of weapons of mass destruction among regional states, particularly Iran.

The P5+1 refers to the UN Security Council's five permanent members (the P5); namely China, France, Russia, the United Kingdom, and the United States; plus Germany. The P5+1 is often referred to as the E3+3 by European countries. It is a group of six world powers which, in 2006, joined in diplomatic efforts with Iran with regard to its nuclear program.

On 24 November 2013, the Joint Plan of Action (برنامه اقدام مشترک), also known as the Geneva interim agreement (Persian: توافق هسته‌ای ژنو), was a pact signed between Iran and the P5+1 countries in Geneva, Switzerland. It consists of a short-term freeze of portions of Iran's nuclear program in exchange for decreased economic sanctions on Iran, as the countries work towards a long-term agreement. It represented the first formal agreement between the United States and Iran in 34 years. Implementation of the agreement began 20 January 2014.

The Joint Plan of Action and the negotiations under it which followed eventually led to an April 2015 framework agreement and then a July 2015 final agreement, the Joint Comprehensive Plan of Action.

Iran's nuclear program comprises a number of nuclear facilities, including nuclear reactors and various nuclear fuel cycle facilities.