Drop Weight Test (IMAGE) DOE/Los Alamos National Laboratory Caption Daniel Preston (left), Virginia Manner (center) and Geoff Brown prepare a drop-weight impact test on an explosive PETN derivative. Credit Los Alamos National Laboratory 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.