A man holds a giant pencil as he takes part in a solidarity march in Paris for the victims of the Charlie Hebdo attack.Stephane Mahe/Reuters
People hold panels to create the eyes of late Charlie Hebdo editor Stephane Charbonnier, as hundreds of thousands of French citizens take part in a solidarity march in the streets of Paris.Charles Platiau/Reuters
Israel's Prime Minister Benjamin Netanyahu (L), Mali's President Ibrahim Boubacar Keita (2ndL), French President Francois Hollande (C), Germany's Chancellor Angela Merke (4thL), European Council President Donald Tusk (5thL) and Palestinian President Mahmoud Abbas attend the solidarity march.Philippe Wojazer/Reuters
Charlie Hebdo newspaper staffers, editorialist Patrick Pelloux, right, and cartoonist Renald Luzier, known as Luz, left, react during a march in Paris, France.Michel Euler/The Associated Press
A woman with Je Suis Charlie (I am Charlie) written on her shaved head and wearing mittens with Canada on them, marches during a solidarity rally on in Montreal.Marc Braibant/AFP / Getty Images
The National Gallery in London is lit in the blue, white and red colours of the national flag of France in tribute to the victims of the terrorist attacks in Paris.Rob Stothard/Getty Images
WASHINGTON, DC - JANUARY 11: The French and American flags wave in front of the Newseum's First Amendment tablet during the Unity Rally in Washington, D.C.Gabriella Demczuk/Getty Images
Supporters hold 'Je Suis Charlie' signs during the Unity Rally at Ipanema beach in Rio de Janeiro, Brazil.Mario Tama/Getty Images
A woman holds a sign flanked by Canadian and Quebec flags in Montreal.Graham Hughes/The Canadian Press
People hold flags and signs as they voice their support for the victims of the recent acts of terror in France, during a solidarity rally in Ottawa.Cole Burston/The Canadian Press