French singer Johnny Hallyday attends a ceremony at Place de la Republique square to pay tribute to the victims of last year's shooting at the French satirical newspaper Charlie Hebdo, in Paris, France, January 10, 2016. France this week commemorates the victims of last year's Islamist militant attacks on satirical weekly Charlie Hebdo and a Jewish supermarket with eulogies, memorial plaques and another cartoon lampooning religion. REUTERS/Charles Platiau