Santiago Pujol (IMAGE) Purdue University Caption Santiago Pujol, an assistant professor in structural engineering, loads a projectile into an impact simulator in Purdue's Robert L. and Terry L. Bowen Civil Engineering Laboratory for Large Scale Research. The apparatus fires beverage cans at various objects to study the impact and energy transfer between a fluid and a solid structural element, such as a support beam. Data from experiments using the simulator have been used to test the accuracy of a simulation to study what likely happened structurally when a commercial airliner crashed into the World Trade Center's North Tower on Sept. 11, 2001. Credit Purdue News Service photo/David Umberger 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.