The United States and France -- the world’s largest maritime domain nations -- are sharing information on unmanned systems and working on interoperability, according to two top military officials. Chief of Naval Operations Adm. Michael Gilday and Adm. Pierre Vandier, chief of the French Navy, spoke to reporters today at the Washington Navy Yard and described their efforts to work more closely together, including a taking trip to the west coast to see new technology that could potentially be brought...