An Alaskan volcano that has erupted several times since last year spewed an ash cloud up to 30,000 feet, leading to an aviation warning.
원문출처 : http://www.cnn.com/2017/07/09/us/alaska-volcano-aviation-warning/index.html
원문출처 : http://www.cnn.com/2017/07/09/us/alaska-volcano-aviation-warning/index.html