CT-Analyst, short for Contaminant Transport Analyst, is an NRL-developed tool that provides accurate, instantaneous, 3D predictions of chemical, biological, and radiological (CBR) agent transport in urban settings. In the past, more accuracy has always meant more computing and therefore, delay. CT-Analyst can provide a timely situation assessment in approximately 0.05 seconds per scenario versus computational fluid dynamics models which can take one to two hours to run. CT-Analyst uses the best computations possible prepared well ahead of time and captures their salient results in a highly compressed database to be manipulated and displayed instantly. A detailed, citywide model of dynamic urban airflow supplies a cutting-edge 3D database of agent airflow to power CT-Analyst. The accuracy of full 3D fluid dynamics simulations with meter-scale resolution is placed at the fingertips of first-responders and emergency managers, in a visual, easy-to-comprehend form with zero time delay.