This report discusses the reasons that Iran is considered a threat to U.S. security, including Iran's nuclear program, involvement with terrorist organizations, and involvement with neighboring countries' local governments. The report also discusses ways which the U.S. hopes to modify Iran's behavior with sanctions, and the effectiveness of these sanctions.

The majority of the world's Muslim population follows the Sunni branch of Islam, and approximately 10%-15% of all Muslims follow the Shiite (Shi'ite, Shi'a, Shia) branch. Shiite populations constitute a majority in Iran, Iraq, Bahrain, and Azerbaijan. Sunnis and Shiites share most basic religious tenets. However, their differences sometimes have been the basis for religious intolerance, political infighting, and sectarian violence. This report includes a historical background of the Sunni-Shiite split and discusses the differences in religious beliefs and practices between and within each Islamic sect as well as their similarities. The report also relates Sunni and Shiite religious beliefs to discussions of terrorism and sectarian violence that may be of interest to Congress.

This report focuses on the United States' relationship with Iran and how the Obama Administration is handling prior administration's economic sanctions against Iran. The Obama Administration's policy approach toward Iran has contrasted with the Bush Administration's by attempting to couple the imposition of sanctions to an active and direct U.S. effort to negotiate with Iran on the nuclear issue. That approach was not initially altered because of the Iranian dispute over its June 12, 2009, elections. However, with subsequent negotiations yielding no firm Iranian agreement to compromise, since early 2010 the Administration has focused on achieving the imposition of additional U.N., U.S., and allied country sanctions whose cumulative effect would be to compel it to accept a nuclear bargain.

This report discusses Iran's economic relations with East Asia especially China, South Korea, and Japan. Trade and partnerships have been been rebounding after the January 2016 lifting of international sanctions on Iran.

This report analyzes U.S. and international sanctions against Iran. The report tracks "implementation" of the various U.S. laws and Executive Orders as designations and imposition of sanctions. Some sanctions require the blocking of U.S.-based property of sanctioned entities.

This report discusses efforts by the non-U.S. parties to the Joint Comprehensive Plan of Action (JCPOA)--the United Kingdom, France, Germany, Russia, China, the European Union (EU), and Iran--to preserve the accord after the United States announced they would cease implementation.

This report discusses the reasons that Iran is considered a threat to U.S. security, including Iran's nuclear program, involvement with terrorist organizations, and involvement with neighboring countries' local governments. The report also discusses ways which the U.S. hopes to modify Iran's behavior with sanctions, and the effectiveness of these sanctions.

This report discusses the reasons that Iran is considered a threat to U.S. security, including Iran's nuclear program, involvement with terrorist organizations, and involvement with neighboring countries' local governments. The report also discusses ways which the U.S. hopes to modify Iran's behavior with sanctions, and the effectiveness of these sanctions.

This report discusses the reasons that Iran is considered a threat to U.S. security, including Iran's nuclear program, involvement with terrorist organizations, and involvement with neighboring countries' local governments. The report also discusses ways which the U.S. hopes to modify Iran's behavior with sanctions, and the effectiveness of these sanctions.

This report provides a brief overview of Iran's nuclear program and describes the legal basis for the actions taken by the IAEA board and the Security Council. It will be updated as events warrant.

This report discusses Iran's foreign and defense policies and their motivations. Policies in each area of the world and their nuclear programs are discussed.

This report describes Iran's known nuclear sites listed in official International Atomic Energy Agency (IAEA) reports and includes a map with the location of the nuclear facilities. For further information and analysis of Iran's nuclear programs, see CRS Report RS21592, Iran's Nuclear Program: Recent Developments, by Sharon Squassoni; and CRS Report RL32048 Iran: U.S. Concerns and Policy Responses, by Kenneth Katzman.

This report discusses India's nonproliferation record and reported transfers to Iran of limited nuclear, chemical, and missile-related materials. Members of Congress have questioned whether India's cooperation with Iran might affect U.S. and other efforts to prevent Iran from developing nuclear weapons.

This report discusses the prospect of bilateral air service between Iran and the United States to resume, after the July 2015 agreement in which Iran accepted strict limits on its nuclear program.

Iran is home to approximately 70.5 million people who are ethnically, religiously, and linguistically diverse. This report discusses these minorities, their treatment under the Islamic regime, and the reactions of international rights groups.

This report provides an overview of Iran's foreign policy, which has been a subject of numerous congressional hearings and of sanctions and other legislation for many years. The report analyzes Iranian foreign policy as a whole and by region.

This report provides background on the agreement negotiated by Iran and six other countries (the United States, the United Kingdom, France, Russia, China, and Germany--collectively known as the P5+1) regarding Iran's nuclear program, and discusses the implications for U.S.-Iran relations.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Photocopy of a script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

This report looks at the background of Iran's nuclear policy. It covers the current status of Iran's nuclear facilities, and current controversy surrounding them, as well as the effects of international sanctions on Iran, recent sabotages on the Iran Enrichment Program, an estimated timeline of Iran's nuclear weapon capabilities, and whether or not Iran even has a nuclear weapons program.

This report looks at the background of Iran's nuclear policy. It covers the current status of Iran's nuclear facilities, and current controversy surrounding them, as well as the effects of international sanctions on Iran, recent sabotages on the Iran Enrichment Program, an estimated timeline of Iran's nuclear weapon capabilities, and whether or not Iran even has a nuclear weapons program.

This report discusses the nuclear agreement talks between Iran and the United States, the United Kingdom, France, Russia, China, and Germany--collectively known as the "P5+1, which finalized an interim agreement ("Joint Plan of Action," JPA) requiring Iran to freeze many aspects of its nuclear program in exchange for relief from some international sanctions.