The Alaska Highway was built through the wilderness in 1942 as a military supply line when the American continent was threatened by the Japanese military This all-year route offers extreme conditions from blizzards at 50° Celsius below to mud and soft going. Keeping the highway open and safe are major operations. Clear filming and informative commentary and interviews give insights into the exploitation and stewardship of the world's second largest forestry area. But the stars of this video are the truckers, owner-operators working under pressure for timber haulage, wood products or the oil industry. Their professionalism is clear, enabling them to keep the life-line of transport flowing in often highly adverse conditions.