Two U.S. Air Force F-15E Strike Eagle aircraft fly over northern Iraq Sept. 23, 2014, after conducting airstrikes in Syria. The aircraft were part of a large coalition strike package that was the first to strike Islamic State of Iraq and the Levant (ISIL) targets in Syria. President Barack Obama authorized humanitarian aid deliveries to Iraq as well as targeted airstrikes to protect U.S. personnel from extremists known as ISIL. U.S. Central Command directed the operations. (DoD photo by Senior Airman Matthew Bruch, U.S. Air Force/Released)