TOPSHOT - US Vice President Mike Pence (C) visits the truce village of Panmunjom in the Demilitarized Zone (DMZ) on the border between North and South Korea on April 17, 2017. Pence arrived at the gateway to the Demilitarised Zone dividing the two Koreas, in a show of US resolve a day after North Korea failed in its attempt to test another missile. / AFP PHOTO / JUNG Yeon-Je (Photo credit should read JUNG YEON-JE/AFP/Getty Images)

TOPSHOT - US Vice President Mike Pence (C) visits the truce village of Panmunjom in the Demilitarized Zone (DMZ) on the border between North and South Korea on April 17, 2017.
Pence arrived at the gateway to the Demilitarised Zone dividing the two Koreas, in a show of US resolve a day after North Korea failed in its attempt to test another missile. / AFP PHOTO / JUNG Yeon-Je        (Photo credit should read JUNG YEON-JE/AFP/Getty Images)