Leidos said Thursday it has shifted from five business units to four, distributing what was its defense business between its intelligence and civil business units. The company created the five business units last year after its merger with Lockheed Martin's information systems and global solutions business. The five units were advanced solutions, civil, defense, health, and intelligence and homeland security. Mike Leiter was tapped to lead the defense group. But Leiter left the company earlier this year ,...