See this layout[0], for example. Notice how the black soot marks are directly underneath the windows. [0] https://img.koreatimes.co.kr/upload/newsV2/images/202

See this layout[0], for example. Notice how the black soot marks are directly underneath the windows. [0] https://img.koreatimes.co.kr/upload/newsV2/images/202104/3016874d05f648df94bba890f1a7dbea.jpg https://img.koreatimes.co.kr/upload/newsV2/images/202104/301...