Lawrence Livermore National Laboratory (IMAGE) Purdue University Caption Employees at Lawrence Livermore National Laboratory work on a high-performance computer. Purdue researchers have collaborated with the national laboratory, using a similar high-performance computer to improve simulations that show a nuclear weapon's performance in precise molecular detail. Credit Photo courtesy of Lawrence Livermore 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.