Hallway experimental set up (IMAGE) University of Maryland Caption Left to right: Eric Rosenthal, a physicist at the U.S. Naval Research Laboratory; Anthony Valenzuela, a physicist at the U.S. Army Research Lab; and Andrew Goffin, a UMD electrical and computer engineering graduate student, align optics at a porthole in the wall in order to send the laser beam from the lab down the hallway. Credit Intense Laser-Matter Interactions Lab, UMD Usage Restrictions Credit must be given to the creator. No derivatives or adaptations of the work are permitted. License CC BY-ND 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.