A man holds a giant pencil as he takes part in a solidarity march (Marche Republicaine) in the streets of Paris on January 11. French citizens were joined by dozens of foreign leaders, among them Arab and Muslim representatives, in a march on Sunday in an unprecedented tribute to this week’s victims following the shootings by gunmen at the offices of the satirical weekly newspaper Charlie Hebdo, the killing of a policewoman in Montrouge, and the hostage-taking at a kosher supermarket at the Porte de Vincennes.