STOCKHOLM, SWEDEN - APRIL 08: Swedish flag placed next to a wall of flowers at the scene of the terrorist truck attack in downtown Stockholm on April 8, 2017 in Stockholm, Sweden. (Photo by Michael Campanella/Getty Images)
STOCKHOLM, SWEDEN - APRIL 08: Swedish flag placed next to a wall of flowers at the scene of the terrorist truck attack in downtown Stockholm on April 8, 2017 in Stockholm, Sweden. (Photo by Michael Campanella/Getty Images)