King Charles set for historic address to Congress in first US visit as monarch

King Charles III is set to address a joint meeting of Congress during his first U.S. state visit as monarch, amid heightened security concerns and tensions over the war with Iran. The visit, marking America’s 250th anniversary, follows a similar historic speech by Queen Elizabeth II in 1991 and occurs as President Trump criticizes the UK for not supporting U.S. military efforts in the Gulf.