Jean-Baptiste Thoret, Charlie Hebdo's film critic, speaks at a news conference in Washington on May 1. Thoret will receive, on behalf of Charlie Hebdo, the PEN American Center's Freedom of Expression Courage Award in New York on Tuesday. Andrew Caballero-Reynolds/AFP/Getty Images hide caption

itoggle caption Andrew Caballero-Reynolds/AFP/Getty Images

Stephane "Charb" Charbonnier, the late editor of Charlie Hebdo, is seen in September 2012. PEN American Center's decision to give the French satirical magazine its annual Freedom of Expression Courage Award has prompted six writers to withdraw from the annual event. Michel Euler/AP hide caption

itoggle caption Michel Euler/AP

Stephane "Charb" Charbonnier, editor of Charlie Hebdo, is seen on Sept.19, 2012. The late editor takes on politicians, the media and "Islamophobia" in a posthumously published book completed two days before he was killed Jan. 7. Michel Euler/AP hide caption

itoggle caption Michel Euler/AP

A drone is displayed Wednesday at Paris store Azur Modelisme. Law enforcement officials in the city are concerned about recent unexplained drone fly-bys of high-security sites, including the Eiffel Tower and the U.S. embassy. Eleanor Beardsley/NPR hide caption

itoggle caption Eleanor Beardsley/NPR

French comedian Dieudonne M'Bala M'Bala arrives for his trial at the courthouse in Paris on Jan. 28. He goes on trial again today on charges of "defending terrorism," following remarks he made on Facebook after the deadly attack on the satirical weekly Charlie Hebdo. Caroline Blumberg /EPA/Landov hide caption

itoggle caption Caroline Blumberg /EPA/Landov

Cherif Kouachi, one of the brothers responsible for the Charlie Hebdo attacks, spent 20 months in Fleury-Merogis prison just outside Paris, where he crossed paths with a radical imam with ties to Osama bin Laden.This photo shows the men's building in May 2014. Charles Platiau/Reuters/Landov hide caption

itoggle caption Charles Platiau/Reuters/Landov

A police photo showing Said Kouachi from an arrest some time before the Jan. 7 attack on the French magazine. Said, who was killed by police two days after the attack, was reportedly secretly buried in his hometown of Reims. Uncredited/AP hide caption

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French President Francois Hollande gestures as he delivers a speech to foreign ambassadors during a ceremony to extend New Year wishes at the Elysee Palace in Paris on Friday. Jacques Brinon/AP hide caption

itoggle caption Jacques Brinon/AP

Pope Francis disembarks from the plane upon his arrival at the airport in Manila, Philippines, on Wednesday. In comments to reporters aboard the plane, Francis said though the attack on Charlie Hebdo magazine was an "aberration," free speech "cannot make provocations," especially against people's faith. Ettore Ferrari/EPA/Landov hide caption

itoggle caption Ettore Ferrari/EPA/Landov

Belgian police block a street in central Verviers on Thursday. Two men were killed and a third arrested when police raided an apartment used by suspected Islamist radicals. Reuters /Landov hide caption

itoggle caption Reuters /Landov