US Vice President Mike Pence (2nd R) and his wife Karen (2nd L) pay a silent tribute at the National Cemetery in Seoul on April 16, 2017.

Pence arrived in South Korea for a three-days visit where the nuclear issue will be top of the agenda at talks with South Korea's acting president Hwang Kyo-Ahn. / AFP PHOTO / POOL / Ahn Young-joon        (Photo credit should read AHN YOUNG-JOON/AFP/Getty Images)