Critical Facilities have a continued need for efficient security, especially pertaining to protecting their perimeters. Facilities must actively monitor and respond to theft, unauthorized intrusions, safety events and potential terrorist activities. The ability to monitor a wide range of events over a vast amount of area in varied weather conditions, while accurately identifying potential threats and reacting is a complicated scenario. The solution calls for knowledgeable personnel and accurate sensors that work together to quickly assess a situation and react to it. This presentation looks at how video analytics can be used to address the perimeter surveillance needs for critical facilities.