Also called carotid artery disease, carotid stenosis is caused by a buildup of plaque inside the artery wall that reduces blood flow to the brain. The process of plaque buildup is called atherosclerosis. Carotid stenosis is a major risk factor for stroke and can lead to brain damage.
Most shipbuilders in the United States are privately owned, the largest being Huntington Ingalls Industries, a multibillion-dollar defense contractor, and the oldest family owned shipyard being Colonna's Shipyard in Norfolk, VA.
The first 1000-foot-long ship built for Great Lakes service was Bethlehem Steel's Stewart J. Cort. It entered service in 1972. There were twelve more footers constructed over the next 9 years. Interlake's Paul R. Tregurtha was the last of this size built for use on the Great Lakes; and is also the largest ship ever built for Great Lakes service. This page was updated on Aug. 24, 2006 with new photos to reflect the newest name changes for several of the 1000-footers: George A. Stinson became American Spirit in 2004, Columbia Star became American Century and Oglebay Norton became American Integrity in 2006.