PARIS, FRANCE - FEBRUARY 15:  People leave messages to pay tribute to the victims of the Copenhagen shootings outside the Danish Embassy on February 15, 2015 in Paris, France. People gathered outside the Danish embassy in Paris, to pay tributes to the victims of the Copenhagen shootings. A gunman opened fire during a debate on art, blasphemy and freedom of expression at the Krudttønden cafe in Copenhagen on February 14, 2015, killing one person and injuring three people. The attackers target is thought to be Lars Vilks, a Swedish artist who depicted the prophet Muhammad as a dog in a 2007 illustration.  (Photo by Aurelien Meunier/Getty Images)