This report provides an overview and analysis of FY2018 appropriations for the Department of Homeland Security (DHS). The primary focus of this report is on Congressional direction and funding provided to DHS through the appropriations process, though note is also made of funding made available to DHS outside this process (e.g., user fees and trust funds). It includes an Appendix with definitions of key budget terms used throughout the suite of Congressional Research Service reports on homeland security appropriations. It also directs the reader to other reports providing context for and additional details regarding specific component appropriations and issues engaged through the FY2018 appropriations process.

This report provides background information and issues for Congress on the Navy's Littoral Combat Ship/Frigate (LCS/FFG(X)) program, a program to procure a total of 40, and possibly as many as 52, small surface combatants (SSCs), meaning LCSs and frigates. A total of 29 LCSs have been procured through FY2017. For FY2018, the Navy is requesting the procurement of two more LCSs, which would be the 30th and 31st. The program presents several oversight issues for Congress. Congress's decisions on the LCS/FFG(X) program will affect Navy capabilities and funding requirements, and the shipbuilding industrial base.

This report presents background information and issues for Congress concerning the Navy's force structure and shipbuilding plans. The current and planned size and composition of the Navy, the rate of Navy ship procurement, and the prospective affordability of the Navy's shipbuilding plans have been oversight matters for the congressional defense committees for many years. The Navy's proposed FY2018 budget, as amended on May 24, 2017, requests the procurement of nine new ships, including one Gerald R. Ford (CVN-78) class aircraft carrier, two Virginia-class attack submarines, two DDG-51 class destroyers, two Littoral Combat Ships (LCSs), one TAO-205 class oiler, and one towing, salvage, and rescue ship. On December 15, 2016, the Navy released a new force-structure goal that calls for achieving and maintaining a fleet of 355 ships of certain types and numbers. The issue for Congress is whether to approve, reject, or modify the Navy's force structure and shipbuilding plans. Decisions that Congress makes on this issue can substantially affect Navy capabilities and funding requirements, and the U.S. shipbuilding industrial base.

This report provides a brief synopsis of selected sections in the National Defense Authorization Act for FY2018 (H.R. 2810), as passed by the House on July 14, 2017, and the Senate on September 18, 2017. The FY2018 NDAA Conference report was passed by the House on November 14, 2017, and the Senate on November 16, 2017. Issues include military endstrengths, pay and benefits, and other personnel policy issues.

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. The program was previously known as the Ohio replacement program (ORP) or SSBN(X) program. The Navy has identified the Columbia-class program as the Navy's top priority program. The Navy wants to procure the first Columbia-class boat in FY2021. The Navy's proposed FY2018 budget requests $842.9 million in advance procurement (AP) funding and $1,041.7 million in research and development funding for the program. The program poses a number of funding and oversight issues for Congress. Decisions that Congress makes on the Columbia-class program could substantially affect U.S. military capabilities and funding requirements, and the U.S. shipbuilding industrial base.