Nine countries currently either say they have nuclear weapons or are believed to possess them. The first to have nuclear arms were the five original nuclear weapons states — the United States, Russia, China, France and the United Kingdom.

President Trump said Monday that he disagrees with Director of National Intelligence Tulsi Gabbard's assessment from a few months ago that Iran is not currently trying to build a nuclear weapon and has not been doing so since 2003.

All five are signatories to the Nuclear Nonproliferation Treaty, which commits countries that don’t have nuclear arms not to build or obtain them, and those that do to “pursue

Nine countries possess nuclear weapons, with Russia having the largest stockpile of military nuclear warheads.

Israel pounded Iran for a fifth day in an air campaign against its longstanding foe’s military and nuclear program, as U.S. President Donald Trump warned residents of Tehran to evacuate and

Israel has targeted the Fordow facility in recent days but, according to the IAEA, so far it has either been unwilling – or unable – to damage it. Here’s what we know about the heavily guarded complex.

Tulsi Gabbard gave official details while speaking at the US House Congress. However, the claims have been rejected by President Donald Trump.

China has an estimated 600 nuclear warheads—an increase of 100 in just one year—the Stockholm International Peace Research Institute reported.