A U.S.-led coalition has conducted nearly 6,000 airstrikes against the Islamic State group, expanding its operations to target the extremists in Syria as well. But a year later, the Islamic State group remains able to launch attacks across its self-declared "caliphate" in both countries, despite some gains by Kurdish fighters and allied Iraqi forces.
Meanwhile, searches continued in Egypt for a missing Croatian hostage that an Islamic State affiliate had threatened to kill.
