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April 25, 2017

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This July 27, 2011, file image from a web posting by al-Qaida's media arm, as-Sahab, provided by IntelCenter, shows al-Qaida leader Ayman al-Zawahri.

IntelCenter / AP

This July 27, 2011, file image from a web posting by al-Qaida's media arm, as-Sahab, provided by IntelCenter, shows al-Qaida leader Ayman al-Zawahri.