Dan Thrasher (IMAGE) DOE/Sandia National Laboratories Caption Dan Thrasher looks to his computer monitor while setting up an optical table at Sandia National Laboratories, where he is testing lasers in combination with barium ions to reduce drift in miniature atomic clocks, making them more accurate. Credit Craig Fritz, Sandia National Laboratories Usage Restrictions For news-reporting purposes only. All other uses must receive express permission from Sandia National Laboratories. License Original 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.