Queen Maxima of the Netherlands puts soil on a tree during ceremony at Rideau Hall on May 27, 2015 in Ottawa, Canada, as she is watched by King Willem-Alexander (C rear), 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)
