On the Greenland ice cap, from left to right, standing: Duncan Wingham (University College London), Robbert Dijkgraaf (President of the Royal Dutch Academy of Science), Volker Liebig (ESA's Director of Earth Observation Programmes), His Royal Highness the Prince of Orangeand Eric Oostwegel (Chairman of the Board of Royal Haskoning), sitting: Joost Klarenbeek (Private Secretary to HRH Prince of Orange), Malcolm Davidson (ESA's CryoSat Validation Manager) and Dominique Detain (Head of ESA TV).