Unwrapped ISIM Structure (IMAGE) NASA/Goddard Space Flight Center Caption NASA engineers check out the unwrapped ISIM structure in a clean room. The ISIM Structure supports and holds four Webb telescope science instruments. Credit NASA, Chris Gunn 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.