BRUSSELS, BELGIUM - MAY 25: Foreign Secretary Boris Johnson (L) and Defence Secretary Sir Michael Fallon disembark a plane as they arrive to attend a NATO summit meeting on May 25, 2017 in Brussels, Belgium. The North Atlantic Treaty Organisation (NATO) is made up of 28 countries. This year's summit is held at their new headquarters in Brussels. The US President Donald Trump will meet other leaders to discuss NATO taking a greater role in the fight against ISIS. (Photo by Justin Tallis - WPA Pool /Getty Images)
