US Interior Secretary Doug Burgum says coal energy kept the lights on for Americans during recent storms. He also talks about the importance of "Project Vault" and stockpiling critical minerals. He speaks on "Bloomberg Surveillance." -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.bloomberg.com for business news & analysis, up-to-the-