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U.S. Defense Secretary James Mattis (L) holds a welcoming ceremony for German Defense Minister Ursula von der Leyen at the Pentagon June 20, 2018. (Xinhua/Ting Shen)
U.S. Defense Secretary James Mattis (L) holds a welcoming ceremony for German Defense Minister Ursula von der Leyen at the Pentagon June 20, 2018. (Xinhua/Ting Shen)