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French President Francois Hollande holds the arm of Israeli Prime Minister Benjamim Netanyahu (L) and Jordan's Queen Rania and her husband King Abdullah II 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 via Getty Images)