High Speed Test (IMAGE) Duke University Caption A high-speed video of a French helmet from World War I being bombarded by a shock wave designed to imitate a blast from German artillery shells a few meters away. Credit Joost Op 't Eynde, Duke University 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.