James Webb Mirrors Being Tested (IMAGE) NASA/Goddard Space Flight Center Caption NASA and Ball Aerospace engineering technicians guide two mounted mirrors into NASA Marshall Space Flight Center's X-ray and Cryogenic Facility's vacuum chamber for testing. Credit NASA/MSFC, E. 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.