Power to the People (IMAGE) DOE/Sandia National Laboratories Caption Logan Rapp (left) and Darryn Fleming, Sandia National Laboratories mechanical engineers, stand with the control system for the supercritical carbon dioxide Brayton cycle test loop. Earlier this year, the engineers delivered electricity produced by this system to the grid for the first time. Credit Photo by Bret Latter/Sandia National Laboratories Usage Restrictions With credit 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.