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Robert O'Brien, national security adviser for U.S. President Donald Trump, attends the 7th ASEAN-U.S. Summit in Bangkok, Thailand, Nov. 4, 2019. (Xinhua/Rachen Sageamsak)
Robert O'Brien, national security adviser for U.S. President Donald Trump, attends the 7th ASEAN-U.S. Summit in Bangkok, Thailand, Nov. 4, 2019. (Xinhua/Rachen Sageamsak)