Members of the special French RAID forces secure the area for the visit by Israel's Prime Minister Benjamin Netanyahu to the Hyper Cacher kosher supermarket January 12, 2015 near the Porte de Vincennes in Paris, where four hostages were killed in a terror attack on Friday. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Members of the special French RAID forces secure the area for the visit by Israel's Prime Minister Benjamin Netanyahu to the Hyper Cacher kosher supermarket January 12, 2015 near the Porte de Vincennes in Paris, where four hostages were killed in a terror attack on Friday. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A member special French RAID forces secures the area for the visit by Israel's Prime Minister Benjamin Netanyahu to the Hyper Cacher kosher supermarket January 12, 2015 near the Porte de Vincennes in Paris, where four hostages were killed in a terror attack on Friday. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

An Israeli flag hangs on a barricade as special French forces secure the area for the visit by Israel's Prime Minister Benjamin Netanyahu to the Hyper Cacher kosher supermarket January 12, 2015 near the Porte de Vincennes in Paris, where four hostages were killed in a terror attack on Friday. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

An Israeli flag hangs on a barricade as special French forces secure the area for the visit by Israel's Prime Minister Benjamin Netanyahu to the Hyper Cacher kosher supermarket January 12, 2015 near the Porte de Vincennes in Paris, where four hostages were killed in a terror attack on Friday. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Bullet impacts are seen on the glass store front at the Hyper Cacher kosher supermarket January 12, 2015 near the Porte de Vincennes in Paris, where four hostages were killed on Friday. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Bullet impacts are seen on the glass store front at the Hyper Cacher kosher supermarket January 12, 2015 near the Porte de Vincennes in Paris, where four hostages were killed on Friday. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Israel's Prime Minister Benjamin Netanyahu (R) arrives under tight security at the Hyper Cacher kosher supermarket near Porte de Vincennes in Paris, to pay tribute to the 17 victims of last week attacks, January 12, 2015. Jewish schools and synagogues in France have been promised extra protection, by the army if necessary, after killings by Islamic militants in Paris, the head of the community's umbrella group said on Sunday after a meeting with the French President. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A man touches the spray-painted shut mouth of a statue near a poster reading "I am Charlie" as he takes part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A Placard with "I am Charlie" is seen placed on the statues at the Place de la Republique during a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A man with a poster reading "I am Charlie" takes part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A woman lights a candle as she takes part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Citizens light candles as they take part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Citizens carrying a placard reading "Coward, Chicken, Yellow-Belly (top) and They, didn't hide. They they did not run (Bottom)" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY TPX IMAGES OF THE DAY)

Citizens carrying placards reading "Charlie it is us" and "The religions united against the hatred" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY TPX IMAGES OF THE DAY)

Citizens carrying a placard reading "Coward, Chicken, Yellow-Belly (top) and They, didn't hide. They they did not run (Bottom)" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY TPX IMAGES OF THE DAY)

Citizens carrying a placard reading "Coward, Chicken, Yellow-Belly (top) and They, didn't hide. They they did not run (Bottom)" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Citizens carrying placards reading "Charlie it is us" and "The religions united against the hatred" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Citizens carrying giant cardboard pencils reading "I'm Charlie" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Citizens carrying a giant cardboard pencil reading "Not Afraid" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A woman holds a placard which reads, "I am Charlie" as hundreds of thousands of French citizens take part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A woman holds a placard which reads, "I am Charlie" as hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Citizens carrying a giant cardboard pencil reading "Not Afraid" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Citizens carrying a giant cardboard pencil reading "Not Afraid" take part in a Hundreds of thousands of French citizens solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY TPX IMAGES OF THE DAY)

A general view shows hundreds of thousands of French citizens taking part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

People hold panels to create the eyes of late Charlie Hebdo editor Stephane Charbonnier, known as "Charb", as hundreds of thousands of French citizens take part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

People hold panels to create the eyes of late Charlie Hebdo editor Stephane Charbonnier, known as "Charb", as hundreds of thousands of French citizens take part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A general view shows hundreds of thousands of French citizens taking part in a solidarity march (Marche Republicaine) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

A general view shows an ambulance surrounded by hundreds of thousands of people gathering on the Place de la Republique to attend the solidarity march (Rassemblement Republicain) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Hundreds of thousands of people gather on the Place de la Republique to attend the solidarity march (Rassemblement Republicain) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Hundreds of thousands of people gather on the Place de la Republique to attend the solidarity march (Rassemblement Republicain) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)

Hundreds of thousands of people gather on the Place de la Republique to attend the solidarity march (Rassemblement Republicain) in the streets of Paris January 11, 2015. French citizens will be 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 police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes. REUTERS/Charles Platiau (FRANCE - Tags: CRIME LAW POLITICS CIVIL UNREST SOCIETY)