(L-R) Israeli Prime Minister Benjamin Netanyahu, Malian President Ibrahim Boubacar Keita, French President Francois Hollande, German Chancellor Angela Merkel, European Union President Donald Tusk and Palestinian president Mahmud Abbas march 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 FEFERBERG        (Photo credit should read ERIC FEFERBERG/AFP/Getty Images)