
U.S. Secretary of State Rex Tillerson (L) shakes hands with NATO Secretary General Jens Stoltenberg prior to a NATO Foreign Ministers meeting at its headquarters in Brussels, Belgium, March 31, 2017. (Xinhua/Ye Pingfan)

U.S. Secretary of State Rex Tillerson (L) shakes hands with NATO Secretary General Jens Stoltenberg prior to a NATO Foreign Ministers meeting at its headquarters in Brussels, Belgium, March 31, 2017. (Xinhua/Ye Pingfan)