U.S. Defense Secretary James Mattis (3rd R) is greeted by U.S. Army Command Sergeant Major David Clark (L) and General Christopher Haas (2nd R) as he arrives at Resolute Support headquarters in Kabul, Afghanistan April 24, 2017. REUTERS/Jonathan Ernst /// U.S. Defense Secretary James Mattis (3rd R) is greeted by U.S. Army Command Sergeant Major David Clark (L) and General Christopher Haas (2nd R) as he arrives at Resolute Support headquarters in Kabul, Afghanistan April 24, 2017.
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