Replicas of a North Korean Scud-B missile (L) and South Korean Nike missiles (R) are displayed at the Korean War Memorial in Seoul on March 6, 2017.
Nuclear-armed North Korea launched four ballistic missiles on March 6 in another challenge to President Donald Trump, with three landing provocatively close to America's ally Japan. / AFP PHOTO / JUNG Yeon-Je        (Photo credit should read JUNG YEON-JE/AFP/Getty Images)