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

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 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