The National Military Command Center (NMCC) is a Pentagon command and communications center for the National Command Authority. 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. "The NMCC is responsible for generating Emergency Action Messages (EAMs) to missile launch control centers, nuclear submarines, recon aircraft, and battlefield commanders".