Huntington Ingalls Industries, the Pentagon's largest producer of multibillion-dollar warships, must do a better job heeding the Defense Department's core management rules, but some of the rules might not "make sense for this business," President and CEO Mike Petters told Inside the Pentagon Monday in a brief interview. The shipbuilder, which spun off from Northrop Grumman March 31, builds nuclear-powered aircraft carriers and submarines in Virginia as well as surface combatants and amphibious ships on the Gulf Coast. The...