Chernobyl, Ukraine

Engineers are using a robot to help build a virtual reality mock-up of the stricken nuclear plant. As part of an effort to rebuild the reactor's protective sarcophagus, the robot will explore and map out the facility. The robot will carry radiation sensors, and three cameras to create a three-dimensional model. Radiation data will be overlaid on the virtual reality mock-up, providing a clear visual indication of an otherwise invisible danger.