THE HAGUE, NETHERLANDS - APRIL 26: King Willem-Alexander of The Netherlands and Crown Princess Victoria of Sweden with in the middle Director-General Ahmet zmc and on the right Dutch foreign minister Bert Koenders attend 20th anniversary of the Organisation for the Prohibition of Chemical Weapons (OPCW) in the Ridderzaal on April 26, 2017 in The Hague, Netherlands. (Photo by Patrick van Katwijk/Getty Images)