​GEERT VANDEN WIJNGAERT​ - P H O T O G R A P H E R

U.S. President Donald Trump smiles prior to a dinner of NATO leaders in Brussels on Wednesday, July 11, 2018. For The Associated Press

British Prime Minister Theresa May, center, German Chancellor Angela Merkel during an EU summit in Brussels, March 2018. For The Associated Press

Britain's Prime Minister Theresa May during an EU summit on Brexit in Brussels. For The Associated Press

Italian Prime Minister Matteo Renzi, center, speaks with Greek Prime Minister Alexis Tsipras, left, and German Chancellor Angela Merkel during a round table meeting at an EU summit in Brussels on Thursday, June 25, 2015. Greece and its creditors launched a new round of talks in Brussels early Thursday in a fresh bid to unlock billions of euros in loans and save the country from bankruptcy. For The Associated Press

Nigeria President Goodluck Ebele Jonathan, 3 April 2014. For The Associated Press

French President Nicolas Sarkozy, right, shares a word with German Chancellor Angela Merkel during a round table meeting at an EU summit in Brussels, December 2008. For The Associated Press

Zimbabwe's President Robert Mugabe appears to be asleep during the first plenary session of the 3rd Africa-EU Summit in Tripoli, Libya, November 2010. For The Associated Press

Luxembourg's Prime Minister and President of the eurogroup Jean-Claude Juncker arrives for an EU Summit in Brussels, June 2012. For The Associated Press

Libyan leader Moammar Gadhafi, right, gestures as he talks with European Council President Herman Van Rompuy during the 3rd Africa-EU Summit in Tripoli, Libya, November 2010. For The Associated Press