
Huntington Ingalls Industries [HII] won a $2.2 billion contract modification from prime contractor General Dynamics Electric Boat [GD] to help build the first two Columbia-class ballistic missile submarines (SSBNs), the company said Nov. 23. GD is the prime contractor to build both Navy nuclear-powered submarines, the Virginia-class attack submarines and the new SSBNs. Under both vessels, HII is a subcontractor and both companies build different parts of the vessels. Earlier this month, the Navy awarded Electric Boat a $9.47 billion…