In the heart of America, on a deadly inland sea that has claimed as many as 6000 vessels and 30,000 lives, a way of life exists that few ever witness. Men who breathe diesel fumes and watch every step they take on shifting decks. Men who battle the elements, wrestle with runaway vessels, fight fatigue and sometimes risk all in the struggle to make a living. They are tugboat men, sailors in constant combat with the deadly storms and hazards of the Great Lakes- men who work against the clock, fighting thick ice forming in every direction under treacherous winter conditions - winds whip so fierce it could knock an entire crew off deck in the blink of an eye. A new 8-part HISTORY series, GREAT LAKE WARRIORS, premiering Thursday, July 19, 10pm ET/9C, will dive into the lives of the tough crews who call 94,000 square miles of wild blue water home. (Source: The History Channel)