Iranian president Mahmoud Ahmadinejad announces Iran's claim to have successfully enriched uranium.

The president of the Islamic Republic of Iran is the head of government of Iran and the second highest-ranking official, after the supreme leader. The first election was held in 1980 and was won by Abulhassan Banisadr. Masoud Pezeshkian currently serves as the president of Iran, after being elected in the 2024 Iranian presidential election and being officially endorsed by the supreme leader.

Mahmoud Ahmadinejad is an Iranian politician who served as the sixth president of Iran from 2005 to 2013. Ideologically a principlist and nationalist, he is currently a member of the Expediency Discernment Council and a strong supporter of Iran's nuclear programme. He was also the main political leader of the Alliance of Builders of Islamic Iran, a coalition of conservative political groups in the country, and served as mayor of Tehran from 2003 to 2005, reversing many of his predecessor's reforms.

Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the northeast, Afghanistan to the east, Pakistan to the southeast, and the Gulf of Oman and the Persian Gulf to the south. Iran ranks 17th globally in both geographic size and population and is the sixth-largest country in Asia. Iran is divided into five regions with 31 provinces. Tehran is the nation's capital, largest city, and financial center.

Uranium is a chemical element; it has symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactively decays, usually by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes, making them useful for dating the age of the Earth. The most common isotopes in natural uranium are uranium-238 and uranium-235. Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.