It was May of last year when Lucas Kuo and Lauren Sung noticed something strange: more than 100 ships gathering in the waters near Haeju, North Korea.
원문출처 : https://www.cnn.com/2020/06/09/business/north-korea-sand-intl-hnk/index.html
원문출처 : https://www.cnn.com/2020/06/09/business/north-korea-sand-intl-hnk/index.html