The National Military Command Center (NMCC), located in the Pentagon, is operated by the J-3 (Operations) Directorate of the Joint Staff, and houses the central command and communications center for the National Command Authority (i.e. the U.S. President and the U.S. Secretary of Defense). The facility, which is composed of several war rooms, is the principal command and control center of the Department of Defense. It is commonly referred to as the NMCC.