what is the role of us secretary of state
United States Secretary of State The Secretary of State is a senior official of the federal government of the United States of America, and as head of the U.S. Department of State, is principally concerned with foreign policy and is considered to be the U.S. government's equivalent of a Minister for Foreign Affairs.[4][5]
Organizational structure of the United States Department of Defense The President of the United States is, according to the Constitution, the Commander-in-Chief of the U.S. Armed Forces and Chief Executive of the Federal Government. The Secretary of Defense is the "Principal Assistant to the President in all matters relating to the Department of Defense", and is vested with statutory authority (10 U.S.C. § 113) to lead the Department and all of its component agencies, including military command authority second only to the President.