PARIS, FRANCE - JANUARY 07: Pens are thrown on the ground as people hold a vigil at the Place de la Republique (Republic Square) for victims of the terrorist attack, on January 7, 2015 in Paris, France. Twelve people were killed, including two police officers, after gunmen opened fire at the offices of the French satirical publication Charlie Hebdo. (Photo by Dan Kitwood/Getty Images)
