Huntington Ingalls is working with the Navy on a plan to produce more submarines, the company's chief executive told Inside Defense this week. The Navy's strategy for purchasing Virginia-class submarines has come under scrutiny following the release of the fiscal year 2017 budget request. In its 2016 shipbuilding plan, the Navy planned to buy one Virginia-class sub in FY-21, but the FY-17 budget reinstates a second sub that year. During a Feb. 25 hearing on Capitol Hill , Navy...