Britain’s King Charles and U.S. President Donald Trump sit in a carriage during a procession through Windsor Castle, in Windsor, September 17, 2025.   The U.S. president’s historic second state visit to Britain began with unprecedented pomp, intense security, technology investments and planned protests. Trump and his wife Melania arrived at Windsor Castle, the oldest and largest inhabited castle in the world and family home to British monarchs for almost 1,000 years, where the royal red carpet treatment includes a carriage procession, gun salutes, a military flypast and lavish banquet. 🔗 Follow our live coverage of Trump’s visit at our link in bio. 📷 TobyMelville #trump #kingcharles #royals #windsor #reuters #reutersphotos