In this image provided by the U.S. Air Force, an F-16 Fighting Falcon takes off from Incirlik Air Base, Turkey, as the U.S. on Wednesday, Aug. 12, 2015, launched its first airstrikes by Turkey-based F-16 fighter jets against Islamic State targets in Syria, marking a limited escalation of a yearlong air campaign that critics have called excessively cautious. (Krystal Ardrey/U.S. Air Force via AP) **FILE**
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