President Yoon Suk Yeol and other participants, including Defense Minister Shin Won-sik, fourth from right, Patriots and Veterans Affairs Minister Park Min-shik, seventh from left, and U.S. Ambassador to South Korea Philip Goldberg, sixth from left, observe a moment of silence during a ceremony at the War Memorial of Korea in central Seoul, Thursday, to mark the 73rd anniversary of the Battle of Lake Changjin, also known as the Battle of Chosin Reservoir, a major battle of the 1950-53 Korean War. Yonhap