TOPSHOT - A well-wisher waits in line to lay a floral tribute to Britain's Prince Philip, Duke of Edinburgh outside Buckingham Palace, central London on April 10, 2021, the day after his death at the age of 99. - Military guns will be fired across Britain and sporting events will fall silent on Saturday as part of worldwide tributes to mark the death of Queen Elizabeth II's husband, Prince Philip. (Photo by Tolga Akmen / AFP)