Reports indicate that samples taken by international inspectors in Iran reveal the presence of enriched uranium. If true, this could be the first hard evidence that Iran has purified uranium outside of safeguards and in violation of its obligations under the Nuclear Non-Proliferation Treaty. Article III of the NPT requires the full application of International Atomic Energy Agency (IAEA) safeguards over all nuclear activities within a member country. Iran recently disclosed that it has been building a uranium enrichment plant at Natanz and claims it plans to place the facility under safeguards. The United States and others maintain that the plant is intended for the production of uranium for use in nuclear weapons, a charge Iran denies.