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From left to right: European Union foreign policy chief Federica Mogherini, a delegate, Paris Mayor Anne Hidalgo, European Commission President Jean-Claude Juncker, Israeli Prime Minister Benjamin Netanyahu, Malian President Ibrahim Boubacar Keita, French President Francois Hollande, German Chancellor Angela Merkel, European Union President Donald Tusk, Palestinian president Mahmud Abbas, Jordan's King Abdullah II, Swiss President Simonetta Sommaruga, Turkish Prime Minister Ahmet Davutoglu and Ukrainian President Petro Poroshenko, Russian Foreign Minister Sergei Lavrov and Belgian Prime Minister Charles Michel during the Unity rally Marche Republicaine on January 11, 2015 in Paris in tribute to the 17 victims of a three-day killing spree by homegrown Islamists. The killings began on January 7 with an assault on the Charlie Hebdo satirical magazine in Paris that saw two brothers massacre 12 people including some of the country's best-known cartoonists, the killing of a policewoman and the storming of a Jewish supermarket on the eastern fringes of the capital which killed 4 local residents. AFP PHOTO/ ERIC FEFERBERGERIC FEFERBERG/AFP/Getty Images
From left to right: European Union foreign policy chief Federica Mogherini, a delegate, Paris Mayor Anne Hidalgo, European Commission President Jean-Claude Juncker, Israeli Prime Minister Benjamin Netanyahu, Malian President Ibrahim Boubacar Keita, French President Francois Hollande, German Chancellor Angela Merkel, European Union President Donald Tusk, Palestinian president Mahmud Abbas, Jordan's King Abdullah II, Swiss President Simonetta Sommaruga, Turkish Prime Minister Ahmet Davutoglu and Ukrainian President Petro Poroshenko, Russian Foreign Minister Sergei Lavrov and Belgian Prime Minister Charles Michel during the Unity rally Marche Republicaine on January 11, 2015 in Paris in tribute to the 17 victims of a three-day killing spree by homegrown Islamists. The killings began on January 7 with an assault on the Charlie Hebdo satirical magazine in Paris that saw two brothers massacre 12 people including some of the country's best-known cartoonists, the killing of a policewoman and the storming of a Jewish supermarket on the eastern fringes of the capital which killed 4 local residents. AFP PHOTO/ ERIC FEFERBERGERIC FEFERBERG/AFP/Getty Images

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Activist: Some leaders shouldn't have marched in Paris

Delphine Halgan from Reporters Without Borders explains why her organization is upset that some world leaders were allowed to march in Paris.

Activist: Some leaders shouldn't have marched in Paris

Delphine Halgan from Reporters Without Borders explains why her organization is upset that some world leaders were allowed to march in Paris.