Answer:
The Chairman of the Joint Chiefs of Staff (CJCS) is the senior ranking military member but may not exercise military command over any of the Armed Forces. The CJCS is the principle military advisor to the President, the National Security Council (NSC) the Homeland Security Council and the Secretary of Defense.
Step-by-step explanation:
The Chairman of the Joint Chiefs of Staff is the highest officer in the United States Armed Forces and is therefore the commander of the United States Armed Forces. The Supreme Commander of the Armed Forces is the President of the United States. The CJCS is also the head of the Joint Chiefs of Staff.
The CJCS is nominated by the president on odd years for a two-year term. The senate must approve the nomination. The mandate can be extended twice.