The security mission never stops. If a detail is protecting a VIP against a serious threat, they will need to provide security 24-hours per-day and 7-days per week. It is impossible to predict where and when an attack might take place. Even if the VIP cannot afford round-the-clock security, there must still be plans and measures in place to maintain security at all times. Therefore as time passes, security operations generally fall into three phases or categories: site security (including compound, building, office, home etc.), mobile security and venue security.