Britain's Prime Minister Boris Johnson boards his plane at London's Heathrow Airport as he heads off for the annual United Nations General Assembly in New York, Sunday Sept. 22, 2019. (Stefan Rousseau/PA via AP)
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Britain's Prime Minister Boris Johnson boards his plane at London's Heathrow Airport as he heads off for the annual United Nations General Assembly in New York, Sunday Sept. 22, 2019. (Stefan Rousseau/PA via AP)
