epa04422743 A handout picture made available by the US Department of Defense (DoD) on 29 September 2014 shows a pair of US Air Force F-15E Strike Eagles flying over northern Iraq early in the morning of 23 September 2014, after conducting airstrikes in Syria. These aircraft were part of a large coalition strike package that was the first to strike Islamic State (IS or ISIL) targets in Syria. EPA/US AIR FORCE/MATTHEW BRUCH HANDOUT EDITORIAL USE ONLY