Tower Tests (IMAGE) DOE/Sandia National Laboratories Caption Sandia National Laboratories is using its solar tower to help assess the impact of extreme temperature changes on materials for the Air Force. Credit Photo by Randy Montoya 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.