180111-N-EX237-051 CRYSTAL CITY, Va. (Jan. 11, 2018) Vice Adm. David C. Johnson, Principal Military Deputy Assistant Secretary of the Navy addresses attendees during a Ship Maintenance Panel with Program Executive Officers at the Surface Navy Association’s 30th National Symposium. This year's symposium focuses on "Surface Forces and Cross-Domain Integration," highlighting common procedures and combined exercises across air, land, maritime, space and cyberspace domains in preparation for a more powerful and integrated Naval Surface Force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Lauren K. Jennings/Released)