TOPSHOTS
Lt. Gen. William C. Mayville Jr., Joint Staff Director of Operations Director of Operations, speaks about airstrikes in Syria during a briefing at the Pentagon September 23, 2014 in Washington, DC. Mayville briefed the press about US and Arab nation joint airstrikes against Islamic State group targets in Syria and unilateral airstrikes against an al-Qaeda group in Syria. AFP PHOTO/Brendan SMIALOWSKIBRENDAN SMIALOWSKI/AFP/Getty Images