National Military Command Center

The National Military Command Center (NMCC) is a Pentagon command and communications center for the National Command Authority (i.e., the president of the United States and the United States secretary of defense). Maintained by the Department of the Air Force as the "DoD Executive Agent" for NMCC logistical, budgetary, facility, and systems support, the NMCC operators are in the Joint Staff's J-3 (Operations) Directorate.

Source: Wikipedia — National Military Command Center (CC BY-SA 4.0)