ESA astronauts Frank De Winne (front), Expedition 20 flight engineer and Expedition 21 commander, and ESA astronaut André Kuipers, back-up for Expedition 20 and 21, during WEAR (WEarable Augmented Reality) training in the Columbus Mock-up at the European Astronaut Centre (EAC) in Cologne, Germany, with Payload Instructor Olivier Lamborelle (middle).