Defense industry executives and Pentagon officials said this weekend the pressure is on to innovate, given the advances of other countries' military capabilities. Speaking at the Reagan National Defense Forum in California this weekend, Wes Bush, chief executive of Northrop Grumman, said that when he first got into the industry, the discussion was around "maintaining our edge." "Today, I think the real issue is: regain our technological superiority, moving us back to a place where we are confident we actually...