NEWPORT NEWS, Va.--Huntington Ingalls Industries’ [HII] Newport News Shipbuilding unit has been increasing its investment in its workforce as it prepares for the possible departure of its aging, most experienced shipbuilders in the years ahead and as it’s working on the first two of 10 ships in the Navy’s new class of aircraft carriers. Newport News Shipbuilding President Matt Mulherin said in a recent interview with Defense Daily that the outfit has spent about $65 million in each of the…