The DoD has funded a dazzling array of 'high tech' solutions for many of the problems facing our military forces. Many of these 'solutions' have been effective for long range mass destruction but have not been applicable for the close-in hand-to-hand combat that we find in our streets. Our goal has been to convert 'high tech' DoD capabilites into cost effective tools to help law enforcement agnecies do their jobs better. Surveillance systems presenetly used by law enforcement officers make extensive use of television, IR, and other line-of-sight surveillance systems. However, these systems cannot tell what is happening on the other side of a wall, behind a bush, around the corner, in the dark, or through dense fog. A new sensor has been developed, based upon technology developed by the DoD for missile warhead fusing. This small, lightweight, low power 'radar' is based upon the phenomena that optimized radio waves can penetrate nonmetallic materials. This new surveillance capability can help provide information about what is in a wall, ceiling, or floor, or on the other side of a door or concrete wall. We will discuss some applications to show how this radar works and how field users can tell if someone is moving inside a building, even when the surveillance officer is several blocks away from the radar.