The Pentagon has issued its first-ever comprehensive policy for the employment of contractors on the battlefield, a document designed to clarify key issues that have frustrated both military commanders in Iraq and the private firms supporting them. Kenneth Krieg, under secretary of defense for acquisition, technology and logistics, approved the new instruction, "Contractor Personnel Authorized to Accompany the U.S. Armed Forces," on Oct. 3. The 33-page document establishes when U.S. forces will provide protection and medical care to contractors in...