COALITION BUILDING Defense Secretary Chuck Hagel listens to a question during a press conference at the Pentagon September 26, 2014. Hagel said defeating the Islamic State in Iraq and the Levant, or ISIL, will require a long-term commitment by the U.S. and its allies on many fronts, and will not be achieved by air strikes alone. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 403813-D-ULJ33-830.jpg Photo Gallery