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. It also discusses ways in which the U.S. hopes to modify Iran's behavior with sanctions, and the effectiveness of these sanctions.

The United States has led the international community in imposing economic sanctions on Iran, in an effort to change the government of that country's support of acts of international terrorism, poor human rights record, weapons and missile development and acquisition, role in regional instability, and development of a nuclear program. This report identifies the legislative bases for sanctions imposed on Iran, and the nature of the authority to waive or lift those restrictions.