The White House will invite allies to a Feb. 18 security summit in Washington to try and prevent violent extremism.

U.S. Attorney General Eric Holder said, "The gathering of justice and interior chiefs came as France mourned 17 victims of Islamist gunmen this week in the worst assault on its homeland security in decades. We will bring together all of our allies to discuss ways in which we can counteract this violent extremism that exists around the world," Reuters reported.