** FILE ** In this April 12, 2013, file photo, a U.S. Marine F/A-18 Hornet jet flies low pass during Philippines-U.S. joint military exercise in northern Philippines. President Barack Obama authorized U.S. airstrikes in northern Iraq, Thursday, Aug. 7, 2014, warning they would be launched if needed to defend Americans from advancing Islamic militants and protect civilians under siege. Obama said American military planes already had carried out airdrops of humanitarian aid to tens of thousands of Iraqi religious minorities surrounded by militants and desperately in need of food and water. The Pentagon said the airdrops were performed by one C-17 and two C-130 cargo aircraft that together delivered a total of 72 bundles of food and water. They were escorted by two F/A-18 fighters. (AP Photo/Bullit Marquez)
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