C2D2 Test Mission (IMAGE) ETH Zurich Caption C2D2 is on a test mission on the Einstein bridge at ETH's Hönggerberg campus. Credit Peter Rüegg / ETH Zurich Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.