STOCKHOLM, SWEDEN - APRIL 09: Crown Princess Victoria of Sweden and Prince Daniel of Sweden leaving the city of Stockholm's official ceremony for the victims of the recent terrorist attack on April 10, 2017 in Stockholm, Sweden. Four people died and fifteen were injured after a hijacked truck crashed into the front of Ahlens department store in Stockholm on April 7, 2017. (Photo by Michael Campanella/Getty Images)
STOCKHOLM, SWEDEN - APRIL 09: The Swedish royal family attend the city of Stockholm's official ceremony for the victims of the recent terrorist attack on April 10, 2017 in Stockholm, Sweden. Four people died and fifteen were injured after a hijacked truck crashed into the front of Ahlens department store in Stockholm on April 7, 2017. (Photo by Michael Campanella/Getty Images)
STOCKHOLM, SWEDEN - APRIL 09: Princess Sofia of Sweden and Prince Carl Phillip of Sweden attend the city of Stockholm's official ceremony for the victims of the recent terrorist attack on April 10, 2017 in Stockholm, Sweden. Four people died and fifteen were injured after a hijacked truck crashed into the front of Ahlens department store in Stockholm on April 7, 2017. (Photo by Michael Campanella/Getty Images)
Members of the Swedish Royal Family (L-R) Prince Daniel, Queen Silvia and King Carl XVI Gustaf arrive at Stockholm City Hall for the official ceremony with a minute of silence at noon to remember the victims of Friday's terror attack on Drottninggatan, Stockholm, April 10, 2017. Four people died and fifteen were injured when a truck plunged into a crowd at a busy pedestrian street in the Swedish capital on April 7, 2017. / AFP PHOTO / TT News Agency / Fredrik SANDBERG / Sweden OUT (Photo credit should read FREDRIK SANDBERG/AFP/Getty Images)
(L-R) Princess Sofia of Sweden, Prince Carl Philip of Sweden, Prince Daniel of Sweden and Crown Princess Victoria of Sweden arrive at Stockholm City Hall for the official ceremony with a minute of silence at noon to remember the victims of Friday's terror attack on Drottninggatan, Stockholm, on April 10, 2017. Four people died and fifteen were injured when a truck plunged into a crowd at a busy pedestrian street in the Swedish capital on April 7, 2017. / AFP PHOTO / TT News Agency / Anders WIKLUND / Sweden OUT (Photo credit should read ANDERS WIKLUND/AFP/Getty Images)
