Mark 21 fuze (IMAGE) DOE/Sandia National Laboratories Caption Sandia National Laboratories is the lead design agency for the Mark 21 fuze. The program is a collaborative effort with NNSA, the Kansas City National Security Campus and the U.S. Air Force. Credit Photo courtesy of Sandia National Laboratories Usage Restrictions Photo may be used with story about the Mark 21 fuze. License Original 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.