Lockheed Martin will continue to seek growth in the U.S. and abroad -- but won't risk being unable to execute on a program, the company's chief executive said Tuesday. Speaking at a media event in Arlington, VA, Marillyn Hewson detailed the company's growth plans , which include a significant focus on international sales. Seeking international sales to make up 25 percent of total sales, Hewson said the company hit 21 percent last year. She said the company is particularly seeing...