Before the Navy can deliver unmanned systems, the service needs to prioritize land-based testing to mitigate risk, especially for surface and sub-surface programs, according to a senior service official. The Navy must prove to Congress -- and to itself -- that it can deliver unmanned capability, Vice Adm. Scott Conn, deputy chief of naval operations for warfighting requirements and capabilities, told reporters at the Navy League's Sea-Air-Space conference. The service is “operationalizing” its Unmanned Campaign Plan through fleet experiments, both...