HII, or Huntington Ingalls Industries, is a major American defense contractor and shipbuilding company. It was formed in 2011 through the merger of Northrop Grumman's shipbuilding sector and Litton Industries. HII specializes in designing and constructing ships for the U.S. Navy and Coast Guard, including aircraft carriers and submarines. The company operates several shipyards, including Newport News Shipbuilding in Virginia and Ingalls Shipbuilding in Mississippi. HII plays a crucial role in national security by providing advanced naval vessels and services, contributing to the U.S. military's operational capabilities and readiness.