King Willem-Alexander of the Netherlands puts soil on a tree during ceremony at Rideau Hall on May 27, 2015 in Ottawa, Canada, as he is watched by Queen Maxima (3rd R), Canada's Governor General David Johnston (2nd R) and his wife Sharon. The King and Queen are on a three-day visit to Canada. AFP PHOTO/DAVE CHAN (Photo credit should read DAVE CHAN/AFP/Getty Images)
