BELGIUM-US-POLITICS-DIPLOMACY-MILITARY-DEFENCE-NATO-NAC

NATO Secretary General Jens Stoltenberg (R) greets US Secretary of State Rex Tillerson upon his arrival for a North Atlantic Council (NAC) meeting at the level of Foreign Ministers, at NATO headquarters in Brussels on March 31, 2017. US Secretary of State Rex Tillerson headed to Brussels on March 31 to push President Donald Trump's demand for NATO allies to boost defence spending. Tillerson is meeting fellow NATO foreign ministers for the first time, ahead of a May 25 leaders summit with Trump in Brussels. / AFP PHOTO / EMMANUEL DUNAND (Photo credit should read EMMANUEL DUNAND/AFP via Getty Images)