President Trump and First Lady Melania Trump made a state visit to the UK in June. They met various members of the royal family, including Queen Elizabeth II, Prince Charles, and the Duke and Duchess of Cambridge, but it was Camilla, Duchess of Cornwall, who was responsible for the most memorable moment of the entire trip. When she was spotted giving a wink to someone off camera as she walked behind Trump, it was quickly described as "the best part about this visit so far." What was she thinking? Maybe we'll never know, but it's great fun to guess.