A demonstrator holds a placard outside Buckingham Palace to protest against U.S. President Donald Trump in London, Britain, on June 3, 2019. U.S. President Donald Trump was greeted with a royal family welcome and protests after he arrived in London on Monday for a three-day state visit. Protesters were out in force across the capital, mainly outside Buckingham Palace and the heavily fortified U.S. Ambassador's official residence in Regent's Park. (Xinhua/Alberto Pezzali)