DAHLGREN, Va. (Jan. 28, 2008) The Office of Naval Research (ONR) 32 MJ (megajoules) Electromagnetic Railgun (EMRG) laboratory launcher, located at the Naval Surface Warfare Center Dahlgren Division in Dahlgren, Va., is the result of Naval Science and Technology research being developed by ONR as one of several Innovative Naval Prototypes. Future U.S. Navy ships will be powered by electric drive propulsion, making EMRG - which uses electricity rather than chemical propellants to launch projectiles - possible. U.S. Navy photo by John F. Williams