The Navy has awarded General Dynamics National Steel and Shipbuilding Co. a $6.75 billion block-buy contract to produce up to eight additional John Lewis-class fleet replenishment oiler ships, the service announced today . The block-buy deal is expected to save approximately $491 million across the eight vessels -- a 6.2% savings compared to single-year contracts -- with the first ship expected to deliver in 2029, according to Tom Rivers, executive director for amphibious, auxiliary and sealift at the Navy’s program...