The Activity, Recognition and Monitoring (ARM) Program seeks to develop an automated capability to reliably capture, identify and classify human activities in surveillance environments. ARM capabilities will be based on human activity models. From human activity models, the ARM Program will develop scenario-specific models that will enable operatives to differentiate among normal activities in a given area or situation and activities that should be considered suspicious. The program aims to develop technologies to analyze, model, and understand human movements, individual behavior in a scene, and crowd behavior. The approach will be multisensor and include video, agile sensors, low power radar, infrared, and radio frequency tags.