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.
Bechtel Corporation (Bechtel Group) is the largest construction and engineering company in the United States, ranking as the 5th-largest privately owned company in the U.S. Its headquarters are in the Financial District of San Francisco.