NASA is set to launch the robotic portion of its Asteroid Redirect Mission (ARM) in 2021. This will be the first mission to visit and collect a multi-ton sample from a large near-Earth asteroid. The collected sample will be used in a demonstration of enhanced gravity tractor asteroid deflection. Recently at the Robotic Operation's Center of NASA's Goddard Space Flight Center in Greenbelt, Maryland, a robotic capture module system prototype used a mock asteroid boulder to test its capabilities. NASA, along with students from West Virginia University, created the mock asteroid boulder from rock, styrofoam, plywood and an interior aluminum frame.