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.
In August, the two halves of the hull â constructed separately in the shipyard â were joined together, creating the biggest hull ever built at 488 metres. (AFP/Getty Images) The Prelude has replaced the Emma Maersk, which measures 1,302 feet, as the worldâs largest ship.