This report provides background information and potential oversight issues for Congress on the Columbia-class program, a program to design and build a new class of 12 ballistic missile submarines (SSBNs) to replace the Navy's current force of 14 Ohio-class SSBNs.

This report provides background information and issues for Congress on the Virginia-class nuclear-powered attack submarine (SSN) program. Decisions that Congress makes on procurement of Virginia-class boats could substantially affect U.S. Navy capabilities and funding requirements, and the U.S. shipbuilding industrial base.

This report discusses U.S. sanctions against Iran and the 2016 Joint Comprehensive Plan of Action (JCPOA) nuclear agreement which led to the lifting of sanctions based on nuclear proliferation in Iran. The bulk of the report outlines the various sanctions against Iran and their current implementation status, international efforts to bring about compliance, and their effects. Recent discussions regarding President's Trump announcement that the U.S. was decertifying the nuclear agreement and the possibility of reinstating certain sanctions are also discussed.

This report reviews cyber supply chain risks, discusses ways in which they are currently managed, and provides issues that Congress may consider.

This report discusses the case United States v. Melgar-Cabrera. A panel of the United States Court of Appeals for the Tenth Circuit (Tenth Circuit) recently upheld the murder conviction of the defendant who the court conceded had been "convicted of a crime that is not a crime."

This report begins by providing a profile of the U.S. research and development (R&D) enterprise, including historical trends and current funding by sector and by whether the R&D is basic research, applied research, or development. The final section of this fact sheet includes data on R&D performance by sector.