The Secretary of Defense is the principal defense policy advisor to the President and is responsible for the formulation of general defense policy and policy related to all matters of direct and primary concern to the DoD, and for the execution of approved policy. Under the direction of the President, the Secretary exercises authority, direction, and control over the Department of Defense.<ref>[http://www.defenselink.mil/odam/omp/pubs/GuideBook/DoD.htm DoD Organizational Structure]</ref> | The Secretary of Defense is the principal defense policy advisor to the President and is responsible for the formulation of general defense policy and policy related to all matters of direct and primary concern to the DoD, and for the execution of approved policy. Under the direction of the President, the Secretary exercises authority, direction, and control over the Department of Defense.<ref>[http://www.defenselink.mil/odam/omp/pubs/GuideBook/DoD.htm DoD Organizational Structure]</ref> |