Article continues below advertisementQueen Camilla's wardrobe during the royal state visit to the United States was a masterclass in subtle diplomacy. As she appeared alongside King Charles III at a series of high-profile events in Washington, D.C., her outfits signaled far more than personal style, quietly reinforcing the enduring ties between the United Kingdom and the United States.The visit, which included a White House welcome, a state dinner, and a joint appearance with President Donald Trump and First Lady Melania Trump, marked the first British state visit to the U.S. since 2007.