Nicholas Rasmussen, director of the National Counterterrorism Center, says progress against the Islamic State may be slow to affect the terror attacks plaguing the West.
The president of the commission of inquiry, former judge Georges Fenech (center left) and Socialist lawmaker Sebastien Pietrasanta (center right) look on during a press conference in Paris on Tuesday to present the conclusions of French inquiry into the terror attacks that rocked Paris in 2015.
Dominique Faget/AFP/Getty Images
Soldiers patrol outside the Grand Place in Brussels on Tuesday. Police arrested two people on suspicion of planning attacks at tourist spots in the city over the holidays.
Geert Vanden Wijngaert/AP
President Barack Obama responds to questions on Russia's intervention in Syria during a news conference in the State Dining Room of the White House, October 2, 2015, in Washington, D.C.
Mike Theiler /UPI /Landov
Members of the Minneapolis Somali community waited in May to enter the U.S. Courthouse where a federal judge ordered four Minnesota men, accused of trying to travel to Syria to join ISIS, to be held pending trial.
Police made one of several arrests at this house in Narre Warren, a suburb of Melbourne, Saturday. Police raided houses in the city's outer eastern suburbs and made several arrests over an alleged attack planned for ANZAC Day.
David Crosling/EPA /LANDOV
Libyan Prime Minister Ali Zeidan speaks to the media during a news conference in Rabat, Morocco, on Tuesday, where he talked about the U.S. action to nab an al-Qaida operative in Tripoli.
President Obama and John Brennan, his top counterterrorism adviser, in the Oval Office on Jan. 4, 2010. Brennan is a key voice about who gets put on the "kill list."
Pete Souza/White House