Webb Space Telescope's Mirror Segments (IMAGE) NASA/Goddard Space Flight Center Caption Engineers and technicians guide six James Webb Space Telescope’s mirror segments off the rails after completing final cryogenic testing this week at Marshall. Credit (NASA/Emmett Given) 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.