The ISIS rebel posted his selfie of him standing in front of his HQ. He even announced on social media that it was their HQ.
Of course, the U.S. Air Force saw it on social media and soon recognized the building. That was all they needed. About 22 hours later, the building did not exist anymore.
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Source: http://www.engadget.com/2015/06/03/the-usaf-found-and-flattened-an-isil-base-because-of-selfies/
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Graphics: Mine
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Keywords: selfie, ISIS, HQ, destroyed, social media