Video on msnbc.com: CNBC's Scott Cohn talks to U.S. Coast Guard Lieutenant Commander Justin Kimura about the impact the deep freeze is having on (more)

Video on msnbc.com: CNBC's Scott Cohn talks to U.S. Coast Guard Lieutenant Commander Justin Kimura about the impact the deep freeze is having on shipping through the Great Lakes. Cohn reports the U.S. Coast Guard has 9 ice cutters covering the region.

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