The Iran nuclear power program is supposed, possible, but not confirmed.
And finally why some countries have the right to have nuclear weapons and others do not ?
TNP proposed the destruction of all nuclear weapons, in all countries, including United States and Great Britain !!
The UN tried to limit nuclear weapons in many ways. For example, the UN simply wanted all nations to disarm itself with all WMD (Weapons of Mass Destruction), this includes Nuclear Weapons. Also when certain countries like Iran and Korea starts a nuclear program, the UN tries to make sure that none of it is used to make Nuclear Weapons.
In 1985, the countries known to possess nuclear weapons capabilities included the United States, the Soviet Union, the United Kingdom, France, and China. Additionally, India had conducted its first nuclear test in 1974, although it was not recognized as a nuclear weapons state under the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). South Africa had developed nuclear weapons but dismantled its program in the early 1990s. Other nations, such as Israel, were widely believed to have nuclear weapons, although they maintained a policy of ambiguity.
The United States, the United Kingdom, the Soviet Union, France and China.
Nations that are known or believed to possess nuclear weapons are sometimes referred to as the nuclear club. In order of acquisition of nuclear weapons these are: the United States, Russia, the United Kingdom, France, and China.
Today eight countries are in possessionn of nuclear weapons. The five nuclear weapons states United States, Russia (former Soviet Union), United Kingdom, France and China, are the only countries allowed to have nuclear weapons according to the Non-Proliferation Treaty (NPT) from 1970. All members of the United Nations except Israel, India and Pakistan have signed the NPT.
All of them except the US and China.
India conducted its first nuclear weapons test, codenamed "Smiling Buddha," on May 18, 1974. This made India the first country outside of the five permanent members of the United Nations Security Council to possess nuclear weapons.
England is part of the United Kingdom and it does have nuclear weapons and has had them for several decades.
All of them have nuclear weapons cause they are the United States.
The United States does not give or sell nuclear weapons to any country. The United States has stationed nuclear weapons on the territory of many countries, but always retained full control of them.
United States and Israel, and possibly other nations.
The decision on which countries can possess nuclear weapons is largely influenced by international treaties and agreements, primarily the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). Under the NPT, five countries— the United States, Russia, China, France, and the United Kingdom—are recognized as nuclear-armed states, while other countries commit not to develop or acquire nuclear weapons. Ultimately, enforcement and compliance are overseen by international bodies like the International Atomic Energy Agency (IAEA) and the United Nations, but geopolitical dynamics also play a significant role in nuclear proliferation discussions.