The nuclear program of Iran is one of the most scrutinized in the world, and has sparked intense international concern. Iran asserts that its nuclear facilities are purely for civilian purposes, including energy production. Despite the end of Iran's covert nuclear weapons program in 2003, fears that Iran is moving closer to developing nuclear weapons have led to rising tensions, particularly with Israel, the United States, and European nations. Iranian nuclear facilities have been targeted by Israeli and United States military strikes in 2025 and 2026.