Iran weighs retaliation for U.S. strikes as Trump raises idea of regime change | 23 June 2025 | Iran and Israel traded air and missile strikes as the world braced on Monday for Tehran's response to the U.S. attack on its nuclear sites and U.S. President Donald Trump raised the idea of regime change in the Islamic republic. Iran vowed to defend itself on Sunday, a day after the U.S. joined Israel in the biggest Western military action against the country since its 1979 Islamic Revolution, despite calls for restraint and a return to diplomacy from around the world. The U.S. launched 75 precision-guided munitions including bunker-buster bombs and more than two dozen Tomahawk missiles against three Iranian nuclear sites, the chairman of the Joint Chiefs of Staff, General Dan Caine, told reporters.