BRUSSELS, BELGIUM - JUNE 05: King Willem-Alexander of the Netherlands attends the 60 years Benelux Council celebration in the Royal Palace on June 5, 2018 in Brussels, Belgium. (Photo by Olivier Matthys/Getty Images)
BRUSSELS, BELGIUM - JUNE 05: King Willem-Alexander of the Netherlands attends the 60 years Benelux Council celebration in the Royal Palace on June 5, 2018 in Brussels, Belgium. (Photo by Olivier Matthys/Getty Images)