The Navy's unmanned procurement efforts are under harsh scrutiny due to the past failures of other programs, Gregory Slavonic, the outgoing Navy under secretary, said Wednesday. Slavonic, speaking at the Surface Navy Association's National Symposium, said he was concerned the Navy's efforts to convey the importance of unmanned systems to Congress "might have [fallen] upon deaf ears." "As you know, we've been marked several times in that area, and I believe that is an area we need to put a...