Scientists say it's likely that the closest active volcano to the Alaskan city of Anchorage will erupt soon. If it does, the primary concern is ash, which could impact both residents and flights in the area. Here's how scientists are preparing. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News on TikTok: https://bit.ly/3TnHioe Follow CBC News on Twitter:

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