U.S. Defense Secretary James Mattis boards a U.S. Air Force C-17 Globemaster for a day trip to a U.S. military base in Djibouti from Doha, Qatar, Sunday, April 23, 2017. (Jonathan Ernst/Pool Photo via AP)
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U.S. Defense Secretary James Mattis boards a U.S. Air Force C-17 Globemaster for a day trip to a U.S. military base in Djibouti from Doha, Qatar, Sunday, April 23, 2017. (Jonathan Ernst/Pool Photo via AP)
