An effective way to get systems from development to the field is through something called "physics modeling." As its name suggests, physics modeling uses all sorts of physics data - from speed, weight, vibration and torque to temperature, humidity, wind, dust, ballistics, and even aging, to name just a few - to simulate real-world conditions that a new weapons system might be subject to. New systems, shown here, were on display at the Association of the United States Army Annual Meeting held in Washington, D.C.