Hanging mid-air ten floors up, a shiny metal robot works its magic. This is no ordinary robotic workspace; this robot cleans away the dirt accumulated on the leading edge of a wind turbine. Controlled by four long cables attached to winches on the ground, the robot is a puppet whose strings are carefully pulled to orchestrate a wide variety of tasks from cleaning to inspection to repair, all suspended hundreds of feet off the ground and can be swapped easily by simply swapping the arm attached.