Britain's Princess Anne The Princess Royal, right, talks to NATO delegates from left, Canadian Prime Minister Justin Trudeau and Britain's Prime Minister Boris Johnson, during a reception at Buckingham Palace, in London, as Nato leaders attend to mark 70 years of the alliance, Tuesday Dec. 3, 2019. While NATO leaders are publicly professing unity as they gather for the London summit, several seem to have been caught in an unguarded exchange on camera apparently gossiping about U.S. President Donald Trump's behaviour. In footage recorded during the Buckingham Palace reception on Tuesday, Canadian Prime Minister Justin Trudeau was seen standing in a huddle with French President Emmanuel Macron, British Prime Minister Boris Johnson, Dutch Prime Minister Mark Rutte and Britain's Princess Anne. (Yui Mok/Pool via AP)