X-ray Footprinting (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Sayan Gupta inserts a sample holder at an X-ray footprinting beamline at Berkeley Lab's Advanced Light Source. Credit Paul Mueller 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.