Mexico's Popocatépetl volcano surprised observers with a startling sight Friday: a massive column of ash billowing in the air.
원문출처 : http://www.cnn.com/2016/11/25/americas/mexico-popocatepetl-volcano-ash/index.html
원문출처 : http://www.cnn.com/2016/11/25/americas/mexico-popocatepetl-volcano-ash/index.html