180222-N-PO203-014 DAHLGREN, Va. (Feb. 22, 2018) Dr. Hans Mark, former secretary of the Air Force, signs the back of a commemorative plaque during the Electromagnetic Railgun line naming ceremony held at Naval Surface Warfare Center, Dahlgren Division. Dr. Mark and retired Adm. James Hogg, who also was recognized during the ceremony, laid the foundation for the U.S. Navy Railgun program and led the effort to explore and illustrate to senior leadership the warfighting advantages of this game-changing technology and were pivotal in gaining the initial funding necessary to demonstrate its feasibility. (U.S. Navy photo by John F. Williams/Released)