(Front row, LtoR) Belgium's Prime Minister Charles Michel, NATO Secretary General Jens Stoltenberg, US President Donald Trump, Britain's Prime Minister Theresa May and Estonia's Prime Minister Juri Ratas and other NATO leaders attend the opening ceremony of the NATO (North Atlantic Treaty Organization) summit, at the NATO headquarters in Brussels, on July 11, 2018. (Photo by GEOFFROY VAN DER HASSELT / AFP)        (Photo credit should read GEOFFROY VAN DER HASSELT/AFP/Getty Images)