Focused on expanding its product sales in the United States and abroad, Kratos Defense & Security is using its own dollars to research new technology, according to the company's chief executive. Kratos, a defense contractor with about $760 million in annual sales in 2014 (excluding a unit that has since been sold), has adapted its strategy in recent years, moving away from government services work and boosting its research in strategic weaponry. The company specializes in unmanned systems, microwave electronics...