NASA astronaut Mike Hopkins, Expedition 38 flight engineer, works on the COLBERT treadmill in the Unity node of the International Space Station.
ISS038-E-046405 (12 Feb. 2014) — NASA astronaut Mike Hopkins, Expedition 38 flight engineer, works on the COLBERT treadmill in the Unity node of the International Space Station. He replaced a failed accelerometer in the exercise device then activated COLBERT for a speed test.