Morocco's Prince Moulay Hassan, Moroccan King Mohammed VI, U.S. President Donald Trump and his wife U.S. First Lady Melania Trump, German Chancellor Angela Merkel, French President Emmanuel Macron and his wife Brigitte Macron, Russian President Vladimir Putin and Australian Governor-General Peter Cosgrove attend a commemoration ceremony for Armistice Day, 100 years after the end of the First World War, at the Arc de Triomphe, in Paris, France, November 11, 2018. Ludovic Marin/Pool via REUTERS