In this Thursday, Feb. 21, 2019, photo, children in Vietnamese and Korean traditional costumes hug at each other at Vietnam-Korea Friendship Kindergarten in Hanoi, Vietnam. The children have been practicing singing and dancing, hoping to show off their talents to North Korean leader Kim Jong Un when he comes to town this week for his second summit meeting with U.S. President Donald Trump. (AP Photo/Hau Dinh)
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