Prof. Mohammed Hassan (IMAGE) University of Arizona Caption Mohammed Hassan, associate professor of physics and optical sciences, let a group of researchers in developing the first transmission electron microscope powerful enough to capture images of electrons in motion. Credit Courtesy Amee Hennig Usage Restrictions None 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.