A Coast Guard lieutenant assigned to the service's headquarters in Washington, D.C., has been arrested on drug and gun possession charges, and is accused of plans to "murder innocent civilians on a scale rarely seen in this country," according to documents filed in Maryland District Court. Lt. Christopher Paul Hasson, an acquisitions officer for the National Security Cutter Acquisition Program, was arrested Feb. 15 and charged with possession of a firearm and ammunition by an unlawful user or addict of controlled substances, and possession of Tramadol, a Schedule IV pain medication. A motion for detention pending trial, filed by U.S....