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.

The map created using a simulation tool shows the devastating impact of a hypothetical U.S. nuclear strike on Tehran, Isfahan, and Qom.

President Donald Trump has dismissed the assessment of U.S. spy agencies that Iran wasn’t building a nuclear weapon before the latest conflict with Israel