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U.S. President Donald Trump (front) arrives at an airport in Hanoi, Vietnam, Feb. 26, 2019. U.S. President Donald Trump arrived in Vietnam's capital Hanoi on Tuesday night to meet with Kim Jong Un, top leader of the Democratic People's Republic of Korea. (Xinhua/Wang Shen)
U.S. President Donald Trump waves after arriving at an airport in Hanoi, Vietnam, Feb. 26, 2019. U.S. President Donald Trump arrived in Vietnam's capital Hanoi on Tuesday night to meet with Kim Jong Un, top leader of the Democratic People's Republic of Korea. (Xinhua/Wang Shen)