If the NCA decides that the United States must launch nuclear weapons, the decision is communicated to the Chairman of the Joint Chiefs of Staff (CJCS) and through him to the National Military Command Center (often called the "war room") via the Presidential Emergency Satchel, informally referred to as the "football." Inside the football is a black book listing a menu of strike options and "The Biscuit," a 3-by-5-inch card with authentication codes for the president to confirm his identity. The menu of strike options include Major Attack Options (MAOs), Selected Attack Options (SAOs), and Limited Attack Options (LAOs). Individual countries or regions can be included in or withheld from nuclear attacks depending on circumstances.