Crisis committees differ vastly from General Assembly and other more traditional MUN councils. Although these crisis committees are less formal but far more dynamic in many ways. A Crisis Committee generally consists of a quorum only suitable for topic/crisis, headed by one chair and one crisis director responsible for moderating debates and updates on crisis situation respectively. Besides debating, delegates may communicate with one another and with the Crisis Room through written notes. These are generally kept secret, although there is always a chance of breach and loss of confidentiality. The Crisis may revolve around one committee in which members struggle for power internally, or several committees called Joint Crisis, where committees will battle each other out for the control over a territory or state. By far the most exciting aspect of crisis simulations is the crisis itself. Unlike other committees, Crisis actually moves forward in time and can be affected by events that occur in the outside world. In sessions, debate may be interrupted with important news or information. Wars may break out, natural disasters may occur, and scandals or corruption may be revealed. Delegates must be able to think quickly, for a single crisis may alter the course of the debate and create new problems that must be responded to immediately. Typically, most of the time in a crisis committee is spent in either moderated or unmoderated caucus, debate formats appropriate to the small number of participants and the rapidly changing nature of the situation.